The middle part from the source article, which was clipped from the Wikipedia article, is"My suspicion is that the majority of Muslims in the United States, who regard themselves as Muslims first and not as Americans really at all, see an American map one day where this is the United States of Islam, not the United States of America. I think it pays to harbor those suspicions."
Does that passage somehow exonerate Severin?  Where did he say "most"?  His words are "majority" and "vast majority".  Are you quibbling about the "vast" which appears in the previous quote but not in the above one?  The phrase "at all" means "in any way or respect" - it is different than the "all" in "all the king's men".  I can't follow your argument here.