Watching America once again points me in a useful direction, The Times Online Sunday edition carries an editorial by Gerard Baker. One line in particular caught my eye,

If Iran gets safely and unmolested to nuclear status, it will be a
threshold moment in the history of the world, up there with the Bolshevik
Revolution and the coming of Hitler. What the country itself may do with those
weapons, given its pledges, its recent history and its strategic objectives with
regard to the US, Israel and their allies, is well known. We can reasonably
assume that the refusal of the current Iranian leadership to accept the
Holocaust as historical fact is simply a recognition of their own plans to redefine the notion as soon as they get a chance (“Now this is what we call a
holocaust”).

He goes on to say that this isn't even the worst part of the whole problem. As they say, read it all.