Why was there conflict between the romans and the jews?

The Great Revolt of Judea marked the beginning of the Jewish-Roman wars, which radically changed the Eastern Mediterranean and had a crucial impact on the development of the Roman Empire and the Jews.

on of the reasons was The Roman views of the Jews ...Seneca (6 BC to 65 AD), a teacher of the Emperor Nero, reflected a very negative and widespread view of the Jews in his writings. He famously wrote “Yet the customs of this most base people have so prevailed that they are adopted in all the world, and the conquered have given their laws to the conquerors”. The Emperor Caligula declared himself a god in 39 AD and commanded that images of himself were to be erected in every house of worship in the empire.  The Jews refused and Caligula threatened to destroy the temple.  He was stopped when he was assassinated by the Praetorian Guard. Some sources attest that Roman soldiers exposed themselves on the temple grounds and burned scrolls of the Torah.  Whether or not these actually happened, there is little doubt that Roman soldiers mistreated the people, such as forcing them to travel or carry burdens (Matthew 5:41).

the images of war are haunting

it's not the readmission