Historical Inaccuracies and Anachronisms
I can't believe this hasn't been mentioned on these boards already. Surely there are intelligent people out there who were irritated by this throughout the movie and can enlighten us by identifying more examples.
My own tentative suggestions:
Men didn't wear jeans in Ancient Judea.
Jewish women didn't wear pants and ride horses astride.
It is unlikely Judah Ben-Hur would exclaim "My God!" with such a casual air.
Jesus did not permanently reside in Jerusalem.
Lock and key mechanisms were not so sophisticated.
The concept of 'progressivism' did not come about until the European Enlightenment (19th Century).