Yes, I'm going to get out that one-noted harmonica again, and I'm going to play the one note on it, just because some things bear repeating occasionally.
Suppose that the bastards who sell that "Obama '08" t-shirt with a picture of Curious George on it also sold, side by side on the shelf, another shirt with the same monkey picture on it but captioned "McCain '08" instead. Are both shirts equally bad? If not, isn't that a double standard?
The answer, of course, is hell yes there's a double standard, and it's there for a really good reason. There's a long, long history of racist rhetoric equating African-Americans with apes, and the Obama/George shirt was clearly designed to appeal to that racist meme in a way the McCain counterpart does not. The double standard isn't a bad thing invented by whiny liberals but an inevitable result of the history of racist rhetoric in this country.
Why say something so obvious? Because over the last few weeks, DailyKos has seen something similar in category to the Obama-monkey t-shirts -- not lots of it, but enough to deserve an ahem. And that's when classic antisemitic memes are dug up, brushed off, and used to slap around people who support Israel.