I don't see how the gay marriage issue can be branded as "atheist activism".
I'd also like to point out the flawed reasoning in saying people who find something "disgusting" would oppose it. This isn't how a lot of people work at all. Certainly in some political philosophies like Libertarianism (I use it as an example because I know it the best), one may oppose certain things like gay marriage or drug use, but respect the right of people to do those things since it doesn't 'harm' anyone but themselves.
I'd also like to point out the flawed reasoning in saying people who find something "disgusting" would oppose it. This isn't how a lot of people work at all. Certainly in some political philosophies like Libertarianism (I use it as an example because I know it the best), one may oppose certain things like gay marriage or drug use, but respect the right of people to do those things since it doesn't 'harm' anyone but themselves.