Andrew Birch replies:

Far from trivializing genocide, the object of my cartoon was to ridicule the revisionists and the French National Front, and I feel that in that context the pun was justified. Just because a subject is of the utmost seriousness surely does not mean that one cannot use humour to make a political point. I obviously regret giving offence to Michael Vicker, but I hope the revisionists were more offended.