Those who would have park-walkers deny that walking in a park is enjoyable, and embrace a walk-less life do the same: ergo anti-park-wakers should also lose their jobs?

Perhaps - but the question is silly - because there is no such thing as an anti-park-walker.

Just as I'm not so sure there is such thing as a serious 'anti-Christian'. People who suggest there is no God and call others stupid for believing in a God? Yes, they exist. But anti-Christians that would put money into a political campaign that seeked to change the law so that Christians were forced to deny Christ? No, I don't think those people exist in a any meaningful number.

Anti-gays that want to deny gays the right to marry - yes, quite clearly, they exist in large numbers.