If,they try to "Force" others to believe what they believe,yes that is Intolerable.Otherwise,I ,personally would like to learn more about the different offshoots of the "Traditional" religions such as Islam and Judisam.I note that both of them have the word "is" within them which may be the only way to describe God. God ,"is".
As,for religion in general ,I would say it was started by individuals that wanted to be looked up to by the people as a source of knowledge.Unfortunately over the centuries many of the leaders of these religions have been corrupted.
That's how I see it. I 'm not a member of any religion ,but It seems there are followers who are "fans-addicts" of all of them.
That doesn't mean they are all that way.Some are truely reasonable people who want to help their fellow man.Others good to church for companionship,and some just to hear the the preachers comments - Interpetation of the bible.