"If countries like Canada do not go into places like Afghanistan, who will?"

Oh...heh! (snicker)

Who will? Why, the Russians, the Chinese, the Romans, the Greeks, the Japanese, the Dutch, the Belgians, Spain, the Nazis, Mussolini, Napoleon, the British, the French, the Persians, the Austrians, the Hittites...you name it!

There are always plenty of nations around willing to invade a smaller country and impose their ideas and their armed forces upon it.

I'm just glad no one has invaded Canada since 1812.