The Romans protected Jews, they were well treated and allowed to practice their religion freely, even use their own laws to deal with Jews. Rome eventually changed their attitude after a succession or Jewish revolts much as other groups had rebelled. Rome was not antisemitic in the sense they persecuted Jews, hunted them down and even mass exterminated them.
Christianity began to blame Jews collectively for "killing Christ" and that's when antisemitism as we use the term today, really began.
The point is that different people interpret scripture differently, we cannot discuss Christianity and Politics without discussing interpretations.
For example Jesus said to pray alone, yet there are Texas Republicans seeking to impose collective prayer sessions in schools, seeking to display the Ten Commandments when few Christians even obey them, this is an abuse of God's word, using it for political ends.
Many Jews too interpret the New Testament as the most antisemitic books ever penned.
Yes I know, and...you want to bring back slavery here?