This post is useless without pictures.
Might as well say that right-wingers are counter protesting in Klansman garb. The claim is just as credible.
Plenty of people have documented Hizbullah and Hamas flags at leftist events for years. I've seen them Only the Al Qaeda bit is remotely odd.
In so far as CAIR, a project of the Muslim Brotherhood, is involved in OWS, it seems to me the cynicism of some is based on ignorance.