The problem with that is the average American voting public couldn't find Israel on the map if they had to much less know what constitutes anti-semite. They do know the name "Hussein" as in Saddam but they do not connect Obama with Saddam or anything else other than "he's this cool guy running for president". People don't like dirty politics and see mentioning "Hussein" as exactly that.
I didn't make these rules and the people that can't help wanting to feel good by saying "Hussein" aren't doing the GOP any favors. If enough of them keep doing it and similar, in mid-November this year everybody will be saying, "Yeah, wait till 2012. We'll really kick 'Hussein's' butt then.
If we can't win on the issues and have to resort to name-calling, it's over right now.