Unfortunately, whatever ideal you hold of conservative doesn't exist. Trumpism is conservatism's current expression in America and Trump is its thought leader. If conservatives were ok tying their cart to a populist demagogue, then they're going to have to go along for the authoritarian ride.
The Republican Party has been the conservative party in name only since at least Reagan, if not Nixon. I'm making a distinction about political schools of thought and ideologies, not current vernacular or American politics.