It's touching that Wlady has gone all white knight on Aaron's behalf, but it doesn't really matter. My points still stand.
What I want Aaron and everyone else hurling this epithet at Waters to recognize is the seriousness of the charge they are making. An anti-Semite is someone who hates Jewish people. There is still no evidence that such hatred motivates Waters, and I fail to see why it is necessary or reasonable to make this (at present) unverifiable claim when Waters's known views already condemn him in the courts of decency and reason.
The paragraph Aaron quotes from Jonathan Marks actually makes my point for me:
One does not have to think that Roger Waters dislikes Jews [empasis mine--MW] to think that his general way of thinking, along with the way of thinking of many of his comrades in arms, is infected with anti-Semitic mythology.