Well, curious as it may seem, London has always been the venue chosen by the World's discerning revolutionaries and 'freedom fighters' (yesterday terrorists) since time immemorial, it's kind of a tradition. Nothing to do with being politically correct, it's just a nice chilled place to plan a quick bit of Regicide or, more latterly, genocide, as there don't seem to be a surplus of Kings lying about the place anymore.
So if you are planning to take over the world, or even just Iraq, pop down to your local travel agent and ask them about the amazing deals on offer for this seasons Jihad Conventions, at a venue near you in London this coming Autumn.