In world war two Gentiles were persecuted because they were not Jewish, the Jewish made fun of them for that, the Jews didn’t like them also and thats another reason they got persecuted.
One reason they were persecuted is because they were not Jews, They didn’t live by the Jewish laws, and how they lived.Another reason is because they believed Jesus was the Son of God, they preached Jesus’ words and they believed that Jesus died for our sins.
The Jews didn’t like the Gentiles because, Gentiles went with Jesus and Jews went with Jesus because when jesus came into the world he said, That everyone should be let in to go to heaven and the Jews didn’t like that and thats why Jesus died because of the Jews.
en.wikipedia.org/wiki/Persecution_of_Christians_in_the_New_Testament#Examples_of_ persecution_in_Luke.