A quote from Kamm:
The objection to Holocaust denial is not that it is "offensive" - a quality about which a free society should be indifferent - but that it is false, and may be consistently advanced only by fraud.
One (indirectly) from Daniel Pipes:
The great question – he said – is how to oppose the barbarians. The Mayor , he said, proposed multiculturalism. But he – Pipes – wanted to win what he termed a War against barbarism. The UK had become a safe haven for terrorists. David Blunkett had noted that British based terrorists had carried out incidents in 15 countries. President Mubarak of Egypt had denounced the UK for protecting terrorists.
And for some more excellent commentary read Sharon Chadha.