No Canadian of good intent should want to make life more difficult for soldiers. We should all show encouragement and offer moral support.
Whenever there's a casualty, the Laytons of our country are in full cry, like hound dogs after a coon. Soldiers in the field know what's happening at home, and it does their morale no good when people who should know better use any opportunity -- even the death of a comrade -- to advance their political agenda.
Conversely, the enemies of our country exploit any dissension -- which should concern all our politicians, regardless of party affiliation.
It's too easy -- and quite misleading -- to assume that because six soldiers died in an enemy attack, that the mission is flawed and failing.
Wikipedia defines treason as a:
...crime of disloyalty to one's nation. A person who betrays the nation of their citizenship and/or reneges on an oath of loyalty and in some way willfully cooperates with an enemy, is considered to be a traitor. Oran's Dictionary of the Law (1983) defines treason as: "...[a]...citizen's actions to help a foreign government overthrow, make war against, or seriously injure the [parent nation]."
Is it an act of treason to merely express concern or displeasure over the mission? No, of course not. In fact it is the duty of the opposition to lend balance and be a voice for those who disagree with the government of the day.
However, timing is crucial.
I have been asked when and under what circumstances should dissension be allowed IMO. Personally, I think that is why we have a Parliament, and a Question Period therein.
But when politicians use the still-warm bodies of our brave, fallen soldiers to score partisan points, I think their actions are beyond revolting.
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Update: Please also read Dan Leger's excellent column in the Chronicle Herald - Canada: Do what's right but don't desert Afghans.