As for the other, Christianity does not necessarily require that the government collect taxes to create a welfare state. This is consistent with conservatism.
Liberalism necessarily requires it though. This is inconsistent with Christianity, which doesn’t.
Atheists don't go around insisting atheism=conservatism. And you have never yet explained to me what "individual sovereignty" is. It sounds like one of those self-serving, made-up phrases like "social justice."
What is individual sovereignty, to you?