As far as I know, Muslim extremists haven't launched a single attack against a Canadian target. Meanwhile, lightning kills about seven people and seriously injures 60 to 70 people a year in Canada.
Shouldn't we be more concerned about lightening?
In fact we are: lots of places have lightning rods, and in the summer here soccer games are cancelled if there is lightning.
So, in fact, you are correct, but we already are.
Quite frankly, we in Canada should be more concerned with Sikh and Tamil terrorists, but that's upopular with political parties who gather support from them.