Ah. It all becomes clear.

The reason that the US is bombing our soldiers, raising import duties on our softwood, and dishonouring our flag by not only letting it touch the ground but spreading it out on the floor of hockey dressing rooms, is all because they’re still smarting from that little manoeuver we did in 1814. You know, the one where we managed to penetrate all the way to Washington and burn down the White House.

Yeah, that would rankle. Thanks to the Grand Poohbah for clarifying.