Jihadists and Greens -- room for temporary alliance?

My husband, the Hoosier Gadfly, now and then comments that environmental extremists are the greater enemy, but that it appears we'll have to deal with Islamic jihadists first. It occurred to me this morning that there is some possibility we'll at some point be dealing with them simultaneously. If bin Laden and Saddam Hussein could contemplate some mutual assistance, despite fundamental differences in their world views, then mightn't these two groups, both of whom are deeply suspicious of scientific and technological progress (though willing to use same for their own purposes), both of whom are nostalgic for eras several centuries past, find ways to help each other out in the short term?

I am more worried than I used to be about the worldwide vigor of an Islam that wishes not to tolerate various democratic freedoms. The chance that environmental extremists will try to tap that energy or benefit from it in some way may not be huge, but it exists.