As a Catholic, I was taught that the Jews were the Chosen People. Jesus and his Apostles and followers were Jews. I don’t understand antisemitism.
Sin and evil are the causes of ungodly hatred towards people in this fallen world. Whether those people are Jews or whether they are Eskimos or whomever.
FWIW. The promise of God upon the Jewish people to destine them to an important and honorable role in the future attracts a lot of demonic opposition to them. This opposition is limited because God limits it (due to His promise He will never destroy the literal Jewish people) but it is very much present. God wants every Christian who is thus tempted by the devil to join in such opposition to get right back in the devil’s face and tell that devil to go back to the hell from where he came. (One proof of a devout Christian is that he or she WILL resist such temptations.) God loves Jews too.
Well, as a reader of history, I understand why the Jews have been persecuted since Jesus’ crucifixion....
The Jewish leaders had Him killed.