I think what many are bashing is the hypocrisy and double standard of attacking some religions for it, while giving others a pass.

Also that since being "against" gays can mean anything from moral disapproval, or disapproval of gay marriage, to advocating the death penalty, throwing gays off buildings, etc., is it disingenuous to equate  all of these.

Just as it would be to equate moral disapproval of adultery, penalising it in divorce, and advocating stoning of adulterers, for example.