People who talk about their beliefs in their own time - absolutely fine. Carry on doing so. I am against any kind of comeback from people's work towards attitudes expressed outside of it.
Refusing to do your job because you might be tangentially slightly associated with something you don't approve of - absolutely wrong. If the adverts on the side of your bus offend you then quit and get a job that's not associated with adverts. In this case, his bosses would be absolutely right to reprimand him - because he's not doing his job.
I hope that's clear.
Original post on Dreamwidth - there are comments there.
- Just to make it clear where I stand on people with different beliefs to myself