Supposedly, conservatism, libertarianism and liberalism all accept the principle of natural human rights i.e. that individuals have rights that exist not because the government or government structures grant those rights but because a person has those rights regardless. However, this supposed core belief is so fragile that it is easily ignored for expedient policy. Fascism is never warded off by compromising with it. There isn’t a safe way for a liberal government to be a bit fascist in one arena in the hope of keeping extremism at bay.
Camestros Felapton on compromises.