And to Germany's communist party, fascists were also distasteful, bigots, and extremists, and they would lead to the collapse of capitalism.
"As late as June 1933 the Central Committee of the [KPD] was proclaiming that the Hitler government would soon collapse under the weight of its internal contradictions, to be followed immediately by the victory of Bolshevism in Germany." - The Coming if the Third Reich, Richard Evans
I'm not going to make some ridiculous statement however that leftists will always side with fascists when push comes to shove. German liberals tolerated fascists to get political power, and German communists tolerated fascists to get political power. They were both fucking idiots for doing so.
You're correct that on the entire spectrum of political theory that liberals are on the right. However, on that grand spectrum, liberals are also authoritarian, and communists are also authoritarian -- because the entire notion of having a centralized government is authoritarian. It's pointless to look at the spectrum from an objective, academic position, because it's totally incongruous with the actual reality of things. When it comes to the scope of Western politics, liberals are left of center, and most tend towards positions of complete civil equality for everyone, which is libertarian in Western scope.
Arguing that liberals are actually on the right is like arguing that we never actually have negative temperatures in winters because Kelvin is always positive and it's impossible to have negative Kelvin. You're technically correct, but for realistic purposes it's utterly meaningless.