A well-timed column today from Michael Gerson:

In Obama's rhetorical universe of mist and fog, divided between gray and deeper gray, he drew one vivid line. Holocaust denial, he said, is "baseless," "ignorant" and "hateful." He talked about the "evil" of genocide, repudiated "lies about our history" and challenged Iranian President Mahmoud Ahmadinejad to visit Buchenwald.

Obama's intensity and clarity on this issue were unexpected -- and needed. Holocaust denial has long been a staple of Middle Eastern anti-Semitism. But it has grown more pervasive since the 1990s -- not merely due to the manias of Ahmadinejad but in service to a broader strategy.

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