To the smooth-brained Communist, one is either a revolutionary (with them) or a reactionary (against them); a revolutionary "on the right side of [Hegel's god named] History," or a reactionary/heretic working against the revelation/achievement of History: the full consolidation/dis-alienation and return of the many into the primal One.
Their catch-all label for reactionaries is "fascist".
I'm no fascist, but I'll own the label "reactionary" nose to tail. The Triune God alone is The One, and by grace alone redeems the many through Jesus Christ our Lord.
Far from being compatible, Communism and Christianity are *radically* incompatible.