RYAN ANDERSON, the National Guardsman charged with Al Qaeda ties, is a Muslim convert. What’s interesting is that before he converted, Anderson also used to be interested in militia groups, and used to post on the misc.activism.militia Usenet group. I’ve noted the danger of links between extremist right-wing groups and radical Muslim extremists before, and though this sort of crossover might seem odd, I think that many of these guys are driven more by generalized anger toward society than by a coherent ideology. And, of course, there’s the unifying thread of antisemitism to make the transition easier.