When the conservative huffs, "I have my principles, and I won't sacrifice them - even if it elects Hillary! Even if it leads to this church being destroyed!", the expectation is we're supposed to say, "Wow, you're admirable! You're not giving up no matter what is threatened!"
Here's the part that goes unrealized nowadays: a commitment to one's principles is only admirable if the principles are worth the sacrifice. When the principles aren't all that valuable at all, the zealous preservation of them isn't admirable - especially not for a Christian. It's just another form of idolatry.
Watching Christians insist that they will fight Trump to the last because he talked about pussy-grabbing once and also he endorses protectionism and THEY are proud free-traders? They've got principles like Peter Singer does. Fucking rotten ones. The man who tries to make Peter Singer forsake his principles, all else being equal, may well have my admiration.