The versions of religion are man made
Agreed.
People worship whatever they want to (thus selfish) and they make religion out of it
Beg to differ. People generally believe what they were taught as children, and/or what someone they admire and respect believes. For example, one of the jws admitted to me that she disliked going door to door, but believed that Jehovah required it.
Do you mean like watching a lot of sport is sometimes called "worshipping" sport?