The point is that since communism is much like a religion in that it rests on absurd faith they have to get rid of the competition as all religions do. They may be lacking a specific deity but it is not necessary to have a specific deity to have a religion. It is all about using faith to believe that which would not be believed by anyone with intelligence. SO they adopt and enforce atheism to suppress some of the competition.
... that it rests on absurd faith
in fact communism is the opposite of faith, they only share in common the fact neither is ever achieved - full employment w/ shared means of production.
I did not say communism IS faith I said it is rooted in faith.
Or contrary to what someone else here said atheism does not lead to communism but faith does.
Communism is base evil and impossible yet people still insist it is achievable and good. Such a belief can only be achieved through blind faith