TweetI saw that movie a while ago, but I do think it was pretty accurateaccording to the Bible. Your first question is really open to interpretation. Not all the Jews believed in Jesus - and the Pharisees ( the religious leaders) saw him as a threat to their authority. They spoke out against him and labelled him a false prophet, a blasphemer and a trouble maker.
Those Jews outside that group may have wanted to see evidence of his Deity, and so encouraged the torture and cricifiction. They wanted to see him save himself. Christ could not give in to this temptation because it was his mission to endure suffering and take on the sins of the world through his innocent death. By taking on the sins of the world (or repentant believers), this allowed them to be worthy of eternity in Heaven after death.
You second question is easy - there was not Roman Catholic church at that time. There was only Rome, and they worshipped many gods (you've probably heard of Mars, Janus, Bacchus, Apollo, etc.) It was not until the Emporer Constantine saw a vision of a cross in the clouds during battle that he converted to Christianity, and made it the official religion of the "Holy Roman Empire."