I believe the term that you're looking for is anti-semitic. From what I've heard he did the opposite.
When the Temple elders met to decide Jesus' fate and to secretly try him, Mel had some who spoke out against what was being done.
Also, I was told that history records the man who took up Jesus' cross as being African. In the movie, they said he was a Jew.
The movie shows a full spectrum of people who were cruel and those who were compassionate. In the end, some of the cruelest were the Roman soldiers, and some of the most compassionate were the Jews.