We historically aren’t usually the ones who fuck up that alliance. Typically(and this is really generalizing, not always true or in this order) the Left in general work together against the Fascists, the Reds then use their authority to try to keep the Revolution on the right path. Then the Anarchists come out either trying to revolt by themselves or they join a color revolution that the bourgeoisie create and they don’t think twice about it. It’s the duty of the Marxists to be open with their beliefs. We aren’t a final boss or anything who “betrays you at the last second, because we had devious plans that we were hiding from the start”, that’s weird af, we let Anarchists know that Big tent will work for a while, but at some point you need to start reading Theory to understand how and why authority is necessary.