From reading the context, apparently he is writing about people that have not yet come to repentance. And rather than saying "that we should come to repentance" or some other limiting term for a special group, he chose an inclusive word like "all." I guess Peter wasn't a very skilled writer, but I think it is more likely that he wasn't a very good Calvinist.
I doubt you read the passage, because you missed the entire judgment that God is bringing, which results in the destruction of the wicked. Let me share it here so you have no excuse for your ignorance.
2 Peter 3:2-18
[2]I want you to remember what the holy prophets said long ago and what our Lord and Savior commanded through your apostles.
[3]Most importantly, I want to remind you that in the last days scoffers will come, mocking the truth and following their own desires.
[4]They will say, “What happened to the promise that Jesus is coming again? From before the times of our ancestors, everything has remained the same since the world was first created.”
[5]They deliberately forget that God made the heavens long ago by the word of his command, and he brought the earth out from the water and surrounded it with water.
[6]Then he used the water to destroy the ancient world with a mighty flood.
[7]And by the same word, the present heavens and earth have been stored up for fire. They are being kept for the day of judgment, when ungodly people will be destroyed.
[8]But you must not forget this one thing, dear friends: A day is like a thousand years to the Lord, and a thousand years is like a day.
[9]The Lord isn’t really being slow about his promise, as some people think. No, he is being patient for your sake. He does not want anyone to be destroyed, but wants everyone to repent.
[10]But the day of the Lord will come as unexpectedly as a thief. Then the heavens will pass away with a terrible noise, and the very elements themselves will disappear in fire, and the earth and everything on it will be found to deserve judgment.
[11]Since everything around us is going to be destroyed like this, what holy and godly lives you should live,
[12]looking forward to the day of God and hurrying it along. On that day, he will set the heavens on fire, and the elements will melt away in the flames.
[13]But we are looking forward to the new heavens and new earth he has promised, a world filled with God’s righteousness.
[14]And so, dear friends, while you are waiting for these things to happen, make every effort to be found living peaceful lives that are pure and blameless in his sight.
[15]And remember, our Lord’s patience gives people time to be saved. This is what our beloved brother Paul also wrote to you with the wisdom God gave him—
[16]speaking of these things in all of his letters. Some of his comments are hard to understand, and those who are ignorant and unstable have twisted his letters to mean something quite different, just as they do with other parts of Scripture. And this will result in their destruction.
[17]You already know these things, dear friends. So be on guard; then you will not be carried away by the errors of these wicked people and lose your own secure footing.
[18]Rather, you must grow in the grace and knowledge of our Lord and Savior Jesus Christ.All glory to him, both now and forever! Amen.
And also knowing that all scripture has a consistent author in the Holy Spirit, Peter is not at odds with the epistle of 1 Timothy, which explicitly tells us:
1 Timothy 2:3-6 KJV
(3) For this is good and acceptable in the sight of God our Saviour;
(4) Who will have all men to be saved, and to come unto the knowledge of the truth.
(5) For there is one God, and one mediator between God and men, the man Christ Jesus;
(6) Who gave himself a ransom for all, to be testified in due time.
This is the go-to of Pelagians.
Read verses 1 and 2 because those verses explain what Paul is saying.
God is not limited to one social status when He saves. He saves all varieties of social status, including kings and leaders for whom we should pray. We Christians should not think that God doesn't save certain groups.
Paul is teaching them not to be prejudiced.
1 Timothy 2:1-6,8
[1]I urge you, first of all, to pray for all people. Ask God to help them; intercede on their behalf, and give thanks for them.
[2]Pray this way for kings and all who are in authority so that we can live peaceful and quiet lives marked by godliness and dignity.
[3]This is good and pleases God our Savior,
[4]who wants everyone to be saved and to understand the truth.
[5]For,There is one God and one Mediator who can reconcile God and humanity—the man Christ Jesus.
[6]He gave his life to purchase freedom for everyone.This is the message God gave to the world at just the right time.
[8]In every place of worship, I want men to pray with holy hands lifted up to God, free from anger and controversy.
And given the context of the scriptures of that Holy Spirit, we know that this is also called "the world" (John 3:16) when it would have been so easy to have instead used an inclusive limiting word, such as 'saints" or "sons of God" or some other term. "World" is awfully inclusive, don't you think? It would have been so easy for the Holy Spirit to have written this conveniently for the Calvinists... so why didn't he?
Pelagians always forget to read the entire dialogue with Nicodemus. If you did, you would see your error.
John 3:1-21
[1]There was a man named Nicodemus, a Jewish religious leader who was a Pharisee.
[2]After dark one evening, he came to speak with Jesus. “Rabbi,” he said, “we all know that God has sent you to teach us. Your miraculous signs are evidence that God is with you.”
[3]Jesus replied, “I tell you the truth, unless you are born again, you cannot see the Kingdom of God.”
[4]“What do you mean?” exclaimed Nicodemus. “How can an old man go back into his mother’s womb and be born again?”
[5]Jesus replied, “I assure you, no one can enter the Kingdom of God without being born of water and the Spirit.
[6]Humans can reproduce only human life, but the Holy Spirit gives birth to spiritual life.
[7]So don’t be surprised when I say, ‘You must be born again.’
[8]The wind blows wherever it wants. Just as you can hear the wind but can’t tell where it comes from or where it is going, so you can’t explain how people are born of the Spirit.”
[9]“How are these things possible?” Nicodemus asked.
[10]Jesus replied, “You are a respected Jewish teacher, and yet you don’t understand these things?
[11]I assure you, we tell you what we know and have seen, and yet you won’t believe our testimony.
[12]But if you don’t believe me when I tell you about earthly things, how can you possibly believe if I tell you about heavenly things?
[13]No one has ever gone to heaven and returned. But the Son of Man has come down from heaven.
[14]And as Moses lifted up the bronze snake on a pole in the wilderness, so the Son of Man must be lifted up,
[15]so that everyone who believes in him will have eternal life.
[16]“For this is how God loved the world: He gave his one and only Son, so that everyone who believes in him will not perish but have eternal life.
[17]God sent his Son into the world not to judge the world, but to save the world through him.
[18]“There is no judgment against anyone who believes in him. But anyone who does not believe in him has already been judged for not believing in God’s one and only Son.
[19]And the judgment is based on this fact: God’s light came into the world, but people loved the darkness more than the light, for their actions were evil.
[20]All who do evil hate the light and refuse to go near it for fear their sins will be exposed.
[21]But those who do what is right come to the light so others can see that they are doing what God wants.”
It must have been as a trial of your faith and an exercise of your patience, having to deal with the words being written in such an open inclusive fashion where God loves all men and wishes to redeem all, giving his life as a sacrifice for the whole world..... and testing you with your skills of deduction as the scripture is written so deceptively to make it seem as if God himself believes men have free will, to sin or obey.
God does work in mysterious ways.
It must be difficult for you when you struggle to observe scripture as a whole and in context rather than force your philosophy into the text.
I cannot help you with your ignorance, but I do encourage you to stop following Pelagian. He was correctly labeled a heretic by Augustine. You keep following him as you do and you'll find yourself enjoying fellowship with gregory and FL.