Well, Keith: I have always suspected the blanket equating of anti-Israel views with antisemitism to be a disingenuous oversimplification; but there is nevertheless no doubt that antisemitism can sometimes become superficially respectable by disguising itself under an "Israel-is-not-above-criticism" cover. The answer to your question in the present instance can ∴ IMO only be 'antisemitism', pure & simple. No other explanation seems to me to cover the facts of the matter so cogently adduced in your post. Stringie, Jim, GF & the rest would do well to question the motivations for their attitudes & expressions.

But will they? Experentia docet, I greatly fear; so it seems unlikely, dunnit?

~M~