What has the gentiles being a large group of people have to do with anything?
And it's not just rejecting God when we hear the word, it's also rejecting him once we know him and putting our lives before him!
I know of people who say that they were saved, loved God. Followed Jesus for years. Yet they have now turned away and become atheists and don't believe in God in any way whatsoever, are they still sealed by the Holy Spirit?
I know others who say that are saved but live a life to the contrary, are they still saved and sealed by the Spirit?
I believe that they have turned from God, not God turning from them, he will always be waiting for those who turn away to repent and come back to him. Just like the parable of the prodigal son. But he won't be mocked GD, we can't take God for granted.
Hebrews 3
Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God. But exhort one another daily, while it is called To day; lest any of you be hardened through the deceitfulness of sin. For we are made partakers of Christ, IF we hold the beginning of our confidence stedfast unto the end;
If we carry on living by the will of our flesh once we know the living God, then we are crucifying the Lord afresh and we put him to an open shame!