Communism is a religion disguised as a political ideology.
Mohammedanism is a political ideology disguised as a religion.
Both are evil, and incompatible with Christianity or with liberty.
Communism is Satan’s #1 weapon against the Kingdom of God designed for atheists.
Islam is the same thing, but for people who accept that a supreme God exists.
Satan can only copy God, so Islam takes basic tenets if Christianity like monotheism and fidelity - but it removes the love and replaces it with hate. A basic comparison between how the Koran and Bible instruct it’s followers to proselytize clearly shows that.