Have a conscience?
Express your views on marriage?
Doubt huge tranches of the evolutionary hypothesis?
Discuss your faith undemonstratively with colleagues without being sacked?
Discuss your faith when you are a professional and a client has asked you to do so?
State that you do not believe that homosexual couples should be granted 'special pleading'?Say that you oppose immigration?
Well, in a huge variety of circumstances - YOU CAN'T!