Not all beliefs are equal. If you hold by a holy text that says that women can (and should) be bought and sold or are otherwise ‘lesser’ than men, or you revere an imbecilic demagogue who claims that all immigrants are rapists, murderers and gang members, then yes, the “culture” of your group will have a higher probability of any given person being an asshole than a group of randomly-selected Humanists, for example. To equivocate that all belief systems are equal from a moral perspective is deeply naive.