If "Monty Python and the Quest for the Holy Grail" did not exist, "Life of Brian" would perhaps be the greatest of the Monty Python films.
This one is extremely well written, with pithy, witty, cutting sarcasm and satirical scenes poking fun at the historical and centextual ancient Judea about the time B. C. became A. D.
Some people are offended by what they consider to be "blasphemy", but I think it's absolutely brilliant the research that went into the cultural and historical context, and how life under the Romans wasn't so bad ("what have the Romans ever done for us?") and how ready everyone is to follow a messiah ("I should know, I've followed a few!").
The sermon on the mount is the only time the big J is referenced in the film, and it's hilarious that the people in the back of the crowd can't make out what he says. "Blessed are the cheese makers", and "blessed are the Greek".
I love the stoning scene and thoroughly enjoy it when people start following Brian after he preaches a bit to escape the Romans (because he wrote "Romans go home all over a wall"). His mother (Terry Jones), is great: "He's not the messiah! He's a very naughty boy!).
The reference to resistance organizations (the Judean People's Front and the People's Front of Judea) are brilliant allegorical references to resistance groups in the Middle East today, and the fact that they don't work together works as a hilarious metaphor of how things never go quite the way you want them.
Brian gets crucified in the end, but is reassured that you should "Always look on the bright side of Life", and I think the Life of Brian is great!