[Neophyte]

The problem with that is that leftism and Islamism can only co-exist to a very finite point. Islam doesn't even accept the basis of civil society...

To begin with the second part of this statement - leftism doesn't accept civil society, too. All is measured by The Party will.

And further on: Leftism and Islamism share a very important and not at all short term ground - both are collectivist ideologies.

[LS]

Ah, come on. Leftists accept the Enlightenment concept of voting, democracies, "rule of law" (except when they don't like it, but even then, at times). There is a HUGE difference between this and the way Mulsims view the world. Do you know they don't even have anything remotely like Locke's 2nd Treatise or Montisquieu's Spirit of the Laws?