Some people that practice it are hypocrites.
the Pope in Catholicism
Just the fact that it exists along with all the other religions on earth fabricated by man to act as a crutch that grew out of superstition with the resultant hierarchy of men in power. I admire the pope for thinking it's BS to remain until you die. Get out and spend your last years doing something for yourself.
the prophesy of Saint Malachai.... that Peter the Roman will be the last pope and Roman Catholic church will be destroyed..
Far to broad a question....they've all the same evils as every other group