And, what proof do we have that this isn't factual?
The Left with its alleged scientific socialism allies itself with the most primitive, antireason component of the three major monotheistic faiths.
Islam rejects reason; e.g., Allah's hand shall not be chained, and as we all know rejects equality before the law for religions and even a semi decent treatment of women; e.g., their acid burnings, honor killings, genital mutilation; etc. All these things the Left supposedly holds dear.