Think about the political spectrum as a circle.....
It’s not a straight line.
For example, on the circle, the far left and the far right are locate next door to each other..but use different issues/words and define themselves differently yet life under either of them appears the same.
It’s not a problem for a anarchist to work closely with a commie, for example...as they have done many times.
Nazis and Communists were fighting for the same constituency, the working class, when that happens, even though for all intents and purposes they are the same, except for the uniforms, they become each others’ biggest enemy.