At NRO, Andrew McCarthy writes, "There is a reason leftists and Islamists collaborate: totalitarianism:"
The one thing that absolutely could not be tolerated was true freedom, the liberty of the individual. For Jean-Jacques Rousseau, the “social compact” would otherwise be “an empty formula.” The irreducible core of the utopia he envisioned, the “undertaking which alone can give force to the rest,” was quite simply this: “Whoever refuses to obey the general will shall be compelled to do so by the whole body.”
Ah, yes, the “general will.” For this, every modern totalitarian movement is indebted to the 18th-century Genevan philosopher who claimed, in The Social Contract, that a man’s compulsory servitude to the state — the embodiment of this general will — “means nothing less than that he will be forced to be free.” Rousseau was what we today call “Orwellian” long before there was an Orwell. “Freedom” was nothing more than submission.
That is why Rousseau so admired Islam.
The history of Islam and the modern Left is one of cooperation when there is some obstacle to their divergent concepts of “social justice” and the perfect society. These are always marriages of convenience, enduring no longer than the enemy that drives them into each other’s arms. But, reliably, it is they — the Islamists and the leftists — who come together when there is a third party in the mix. Rarely will one collude with a common enemy against the other. Today, the common enemy of Islamists and leftists is individual liberty, especially the social, economic, and political freedom guaranteed by the American Constitution, as conceived by the Framers. Conceived, that is, by men who saw government as a necessary evil to be rigorously limited lest it devour true freedom — not as an essential good to be empowered for the very purpose of enforcing servitude.
Collaborations between Islamists and leftists — past examples and those happening right before our eyes — are numerous, so much so that I admit to being dumbfounded by the frequency of the question of whether they really happen. That there is collusion is undeniable.
Read the whole thing; like I've quipped before, Al Gore didn’t call it the Assault on Reason for nothing.