Christopher Caldwell, writing in today's Financial Times opposes laws outlawing Holocaust denial, mainly on free speech grounds. He also raises the fact that these laws don't work. At the same time he recognizes that, while those western countries which have such laws [e.g. France] must undo them, those who would deny the Holocaust are "violent people of ill will."
I discovered this article while drinking an espresso in a cafe near the Roman Forum. Someone had left a copy of the Financial Times nearby and I picked it up.
Seems like this stuff follows me wherever I go....