Although “left unity” is pure idealist crap. A Marxist-Leninist's unity is extremely important. If a person likes Marx, Lenin and supports China, they are a comrade. Those are the only qualifications necessary for our unity, imo. Well, just someone who supports China is probably good enough.
ML is pretty important. If you support China because you think they’re great capitalists, then that’s pretty sus. Supporting China while being ML shows that you’re pragmatic and not dogmatic.
Either way, just these three are fairly loose standards already.