[gadders]

I think the "don't be political" works both ways.

If someone, say, brought up their gay partner to a colleague who is very religious, I'd expect the religious colleague to treat them courteously. I wouldn't expect them to tell them that they will burn in hell for all eternity.

Maybe the line to be drawn is one of policy vs people. As a policy decision, you could be against gay marriage but on a personal level still be happy for a gay colleague that got married. Or happy that they are happy.