The nicest things I can come up with are music, buildings, expressions of surprise (jesus christ!, oh my god!, holy fuck!) and that's about it. It also gives wars, crusades, corruption, lying to masses, general disgustingness really.
Division among communities and nations as well as family and friends. Hatred of groups of people who think or live differently. Intolerance. War. Gee, there's just so much.
It destroyed all of the ancient knowledge, was responsible for the Dark Ages, murdered millions in the name of Jesus, or Mohammad I can go on for some time, but you get the picture.
a whole lot of war; unity amongst those in the same religion but at the same time it has caused people within the same religions to turn against eachother and hurt eachother as well as outsiders