Why do religions exist?

Seriously, why the fuck do we still have monotheistic religions when now they are banning adopting for ALL couples who are not married in a state. They say this is to STOP THE GAY AGENDA LOL when they fail to realize many straight couples refuse to get married due to legal issues this may bring for the future.

Since when the fuck did America become the Christian Empire, and when the fuck can we expect this shithole country to go over and die for being fucking assholes? This shit pisses me the fuck off.