So if you want to be a politician in a secular democracy and always vote according to your religious convictions become an independent with no party affiliations. Don't piss and moan when an ostensibly secular party establishes policies that conflict with your religious sensibilities. Either suck it up and vote the party line when policy has been established under due process of the party, or have the balls to quit and go independent.
Also, go look up the dictionary definition of "liberal" and realise that liberal and religious conservative don't mix well. Start a conservative party and ask the people to vote for your conservative ideology.
I am very strongly religious, but I'm not a whiney bitch about the fact that 99% of people don't hold the same values as me. If you don't like abortions, don't become an abortion doctor, and don;t invest in companies that run abortion clinics or that make medical equipment for carrying out abortions, or pharmaceutical companies that make the morning after pill. But don't tell other people that they must submit to your religious views when they form no part of their views, and in a country that runs as a secular democracy. Jesus taught you to love and fogive, he never taught you to impose your will on others. If you want religion to make the rules then go live in a theocratic country.
And finally, if you don't want to compromise DON'T EFFING GO INTO POLITICS!! And for public servants, if you don't like the laws that you have to administer then don't go into public service, or move to a different public service that has laws to administer that you do like. You live in a country that follows the rule of law principle. Learn what that means FFS and stop trying to assert that your religious beliefs usurp the rule of law in the act of carrying out the laws of your country that have been constitutionally validated!
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix