Hmmm, I think we all just hope to save our civilization, we do not have to resort to ... extreme, very extreme measures.
"preached that Islam must subsume all other religions."
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This is the problem. We keep trying to be tolerant, while they will only accept the total annihilation of the Western culture. We should fight fire with fire: if they want to live amongst us, either they will "live and let live" or deport them. But I think it's actually too late for that.
France is already 10% Muslim.