A communist isn’t a tankie per sé. Tankies are people who blindly follow authoritarians of a communist regime and defend/deny the gruesome acts committed by said authoritarians. The idea behind communism is a valid one. In a perfect world, communism would lead to the star Trek utopia. Problem is, assholes will always take advantage and turn everything to shit. I still prefer communism over the heap of flaming shit most of the world lives in.
So you’re cool with what happened at tiananmen square? Or maybe you deny anything bad happened there? Because that’s what being a tankie is all about. Tankie != Communist.