Khuram Butt is a British citizen.  No doubt that had he lived he would have served a lengthy jail sentence, had his citizenship revoked and shipped back to Pakistan.
If this happened in Canada, this traitorist attack would have put him in jail for a lengthy time and upon  his release he would still be a Canadian citizen enjoying all the rights and privileges that Canada and the Canadian tax-payers provide.  Does this make any sense to anyone?  Thanks Trudeau for putting Canadians at risk of foreign-born terrorists.