Reasons to dislike religion? That's a hard one... having to choose...
Let me check again the good book... I guess I could just open it on any blind page and I would find a reason.
But let's pick a good one:
"No one born of a forbidden marriage nor any of their descendants may enter the assembly of the LORD, not even in the tenth generation." or
"If a person is illegitimate by birth, neither he nor his descendants for ten generations may be admitted to the assembly of the LORD"
Deuteronomy 23:2 (check different translations here: http://biblehub.com/deuteronomy/23-2.htm)
Yes, you read it well. If up to about the year 1700, one of your ascendants was born out of marriage or from a forbidden marriage, you are going straight to hell, no matter what all of them did after or you did in your entire life.
Well, up to the tenth generation, you have 1024 ascendants. If only one of them was a bastard, you are nailed.
Moreover, since the text isn't clear ("not even in the tenth generation"), you might not be off the hook even if you have ten clean generations. No where the text says that at the eleven generation everything will be alright again.
Good luck.
Thats me totally screwed then, oh well i might as well go out and do some raping and pillaging since I'm going to hell anyways. I don't know why they even changed from the old testament, thats what originally written so surely that's what we should follow. I mean its outrageous that I'm not even allowed to beat my slaves anymore.