The Real Reason: Speaking of the National Review crowd, Canadian MP Monte Solberg has a snappy line in a piece there:

Let's quit pretending. If these "peace" demonstrators are so concerned about war, then where are they the other 364 days of the year when they could be protesting dozens of other wars that will dwarf Iraq in terms of corpses? ... Why not protest the Sudan or Chechnya today? Those are first-class slaughters of men, women, and children. Those rallies are unlikely, though, because protesters can't blame the Sudan or Chechnya on the Americans and especially on George W. Bush. For a good number of people this is not about war at all. It's just primal-scream therapy for people who hate George W. Bush.

The rest is boilerplate (and poorly-edited boilerplate -- editing being the bane of on-line journalism) Chretien-bashing, if that's your bag.