And God also ordained all those who would have eternal life. Acts 13:48 KJV
The scripture says when the GENTILES heard this they began rejoicing. Why do you think they were rejoicing? The Gentiles were just told that they could now have a relationship with God; they could now have eternal life. The Gentiles used to be excluded, and without God in the world, see Ephesians 2:12. HOWEVER, NOW they were told they could have salvation! All those Gentiles who were there who heard the good news, that Gentiles as a race of people could now have eternal life, they believed. Gentiles as a nation of people were appointed to eternal life, not all Gentiles will have eternal life, and only the Gentiles who believe will have eternal life. The Gentiles who were appointed life---all those there at that time believed.
Acts 13:48 When the Gentiles heard this, they were glad and honored the word of the Lord; and all who were appointed for eternal life believed.
There were Jews AND Gentiles in the crowd. All who were appointed [the Gentiles] in the crowd, all of them there believed.
God does whatever His Soul desires Job 23:13 KJV,
God wants all to be saved, and repent, but not all will.
1 Timothy 2:4 who wants all people to be saved and to come to a knowledge of the truth.
Ezekiel 18:23
Do I take any pleasure in the death of the wicked? declares the Sovereign LORD. Rather, am I not pleased when they turn from their ways and live?
Ezekiel 18:32
For I take no pleasure in the death of anyone, declares the Sovereign LORD. Repent and live!
Ezekiel 33:11
Say to them, 'As surely as I live, declares the Sovereign LORD, I take no pleasure in the death of the wicked, but rather that they turn from their ways and live. Turn! Turn from your evil ways! Why will you die, people of Israel?'
John 3:17
For God did not send his Son into the world to condemn the world, but to save the world through him.
1 Timothy 4:10
That is why we labor and strive, because we have put our hope in the living God, who is the Savior of all people, and especially of those who believe.
Titus 2:11
For the grace of God has appeared that offers salvation to all people.