First off, the priest bought the land that Judas killed himself on, and there is the account he hanged himself. In acts, from my take, his body did fall on the ground, after he was dead, hence the part it burst open, meaning it fell from a height and was decaying.
Catholics value Church tradition and the word of the pope over the Bible, meaning if the two are in conflict, they go with the pope and tradition. Any Catholic priest, nun, or anyone who studied for their ministry will tell you this. The church fell to corruption as it became entangled with the politics of Europe at the time. While many people may be offended by these statements, they are none-the-less true after researching them and comparing their altered doctrines to the Word of God.
My only problem with the movie are 2, 3 scenes, 2 in conjunction with each other. The first was the little girl wiping Jesus' face. This is trying to give support to the veil of Veronica relic that Catholics look to for healing. The second starts with the scene where Peter humbles himself at Mary's feet, and then a later scene that Jesus says that He is the son of God's blessed handmaiden at the end of a line. MAybe I took this last one the wrong way, but these two scenes tied together seem to exalt Mary too high. Over all, a good, accurate movie, and in the coming months, I look to research into how this movie has had lasting impacts on people over time.