the biggest threat to liberalism today is not conservativism. conservatism has been largely discredited. the biggest threats to liberalism come from these people that call themselves progressives, as they're trojan horses for the church - friendly fascists that want to enforce the same worldview that conservatives do, but prefer to use more collectivist methods.
that is the difference between a conservative and a progressive: conservatives are pragmatists that want to enforce religion with a gun, whereas progressives are idealists that want us to come to religion together and live it out via free will.
liberals that want to overthrow the religious order altogether need to step away and see them as two sides of the same coin.