Titus 2:11 For the grace of God that brings salvation has appeared to all men,
How do you feel when you are left out of some sort of event or meeting just because you are in the wrong class, building, country or other classification?
God started with the Jews to focus the minds of the people and to make sure they knew He was God of everything.
When Jesus gave His life it was given for everyone, more specifically given for the purpose of forgiveness to everyone who believes it so.
That does mean anyone can accept this free gift from Christ!