Firstly, liberals are not left of centre, they are the original capitalists, the ideology that socialism was built in opposition to.
Secondly, Liberals will always side with fascists when push comes to shove. To liberals, Fascists are distasteful, bigots and extremists, however, fascism does not threaten the liberal system. It does not threaten the liberal ruling class, at least inherently, whereas socialism is an existential threat to that class. To a liberal economy, to a liberal nation.
This would be a good mirroring response if it had any amount of truth to it. To the Communists in Germany, the fascists were their mortal enemy. The two parties were fighting in the streets. The Communists saw the fascists as a capitalist system, they certainly were not under the impression that fascism would bring about the end of capitalism.
A declaration by the Communists that the Fascists would collapse under their own contradictions is not evidence to the contrary, or evidence that the German communists tolerated the fascists.
Liberal and libertarian are not the same thing and cannot be conflated, and authoritarianism isn’t anything with a state.
I swear, the political compass has rotted people’s brains.