Multi-culturalism isn't dead & it isn't a failed experiment - I'm a Londoner, possibly the most 'multi cultural' city in the world and it has been so for several hundred years; has it's hiccoughs but, on the whole, I like it!
But if you say it has failed, then you are letting this creature & all the other hate-filled individuals (from whichever part of the spectrum they come from) win; and for the sake of the people who dies at his hands, and at the hands of others, we can never let him win, it would be an insult to their memory. In London, on 8/7/2005, we picked ourselves up, brushed ourselves down, and got back on the tubes, ba.ck on the buses - by doing that the hate filled individuals who had killed so many the previous day were robbed of their victory