Some of the humour is Definitely 'hard to get'.

"Life of Brian" would be a good starter because Brian is mistaken for the Messiah just as Jesus is going through His ministry. (You only see the Jesus figure once, for several seconds, from a great distance - Mount of Olives). So at least the storyline is somewhat familiar.

But with poor Brian trying to prove he is not the Messiah, there is a good deal of satire and humour. Not for the right-of-wing among us(then again, can't hurt! )