these are fake communists infesting the republic of india because they support islamic fundamentalists.
communism only concerns the difference between rich & poor i.e. the class struggle. genuine communists never support racial, religious, ethnic or language groups.
true communists as found in the erstwhile soviet union and china would never associate with religion and suppress all religious activities. the soviets suppressed the church while the chinese suppressed all buddhist & taoist activities.
always use the term "fake" or "self-styled" when describing the calcutta communists