My two cents on how to achieve left unity:
Anarchists: Stop using the word tankie. It pushes your fellow leftists away and pisses them off. Instead make specific criticisms of communist countries. ESPECIALLY stop calling MLs “red fash”. There is already enough misinformation going around about fascism.
Marxist-Leninists: Embrace critical support. Be willing to criticize and accept criticism of nations like China, the Soviet Union, and especially North Korea. Remember that being against US imperialism is not the only thing that makes a country good.
Fucking this. The power of the left is in our care and empathy, that empathy gives us the ability to fight for what's right and help those around us. This builds networks, strengthens relationships and shows the world that we don't need to subscribe to a capitalist mindset.
Anarchist or ML, you know that community organisation is foundational. We can sort out the kitty gritty later, for now we need to work together to build our base and begin to push an anti-capitalist agenda.