Do you have to support Stalin to be a communist?

Compared to other communist-leaning subreddits, and I don't mean to be rude at all, but this subreddit specifically seems to praise Stalin as if he did literally nothing wrong. I tend to follow the Communist Party of Britain's FAQ about Stalin, which says"The crimes committed during the Stalin period cannot be ignored. But the first attempts to build a socialist society took place in a semi-feudal society facing the hostile forces of imperialism. A bureaucratic-command system of economic and political rule became entrenched. The Communist Party of the Soviet Union and the trade unions became integrated into the apparatus of the state, eroding working class and popular democracy. In the late 1930s in particular, severe violations of socialist democracy and law occurred as large numbers of innocent people were imprisoned and executed. Lessons have to be learnt from both the achievements and the failures of this period."I know I'm a communist, yet I don't know what kind of communist I really am, I follow the teachings of Marx and Lenin, but again, I don't know where I stand on the issue of Stalin. What do you comrades think? via /r/communism https://ift.tt/2w4YM07