The meaning of Galations 3:28
There is neither Jew nor Gentile, neither slave nor free, nor is there male and female, for you are all one in Christ Jesus.
is that whether Jew or not, our salvation comes through Jesus Christ. The Jews are NOT saved through observing the law, and must go through Jesus for salvation
John 14:6
Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
Paul, being a Jew, did not say Jews can adhere to the law and be saved, but instead preached the gospel of salvation through Jesus Christ.
So why is the identity of the Jews important? Revelation 2:9 and 3:9 tell us there are those who are of the synagogue of Satan, those are the ones that you do NOT want to be following or supporting.
It also tells me why American descendant of slaves have not yet gotten their reparations and there is such resistance to it. Slavery started in 1619. It also tells me that why in 2020, after 400 years passed, that America is now suddenly declining. If America, especially Washington DC, is 'burned with fire', then it will confirm everything.