If there's one thing I learned from Ukraine, it's that a lot of leftists will actually go pick up a rifle and "fight fascism," even if it's 9,000 miles away, over an ocean, they have no idea what they're doing, etc. I even hear of people IRL who tried to finesse a trip to Ukraine.
It's important to note that although their internet arguing skills don't forge them into warriors, a lot of them also don't have the self-preservation instinct to let that stop them from picking up a gun. Indeed, some of them are suicidal and hate themselves. So they're going to kill or make you kill them.
So I expect at least some of the fags making and upvoting anti-Trump webcomics would literally try to kill Americans. I suspect a lot of regular young men would also join up. Another thing Ukraine taught me is that there is a larger mass of somewhat normal 18-25 year olds that are itching for an adventure and can be seduced into war, just like it always was.
Of course this whole post is moot because we'd never invade, and if we did then Canada would crumble in under 2 weeks, if not 2 days, since all of their major population centers are literally on our border and we wouldn't be supplying them with billions of dollars in weapons. But I still find it interesting to talk about because it's important not to underestimate these people. Just because they post gay fanart and live in obese poly households doesn't mean they can't shoot up a school.
Activists aren't the actual soldiers. Canadian & US Soldiers get along quite well and have very similar personality types and value systems. More than anything, they are actively disparaged in Canada and are a bit resentful of their mal-treatment. You see the same thing in the UK.
In the impossible event of a war, Canadian Leftists would commit terrorist attacks both against their own conservative Canadians, and operate as terror-cells in the US. But a shit ton of the Canadian military would probably just stand down if you took the time to talk them out of their orders. Maybe not the Generals and Admirals, but anyone Colonel & below, or Master Sergeant and below, would basically be on-side if you convinced them to not follow their orders.
Yeah, this very well might be a war best fought by not touching their military assets. Just give them a wave as you pass them by, on your way to kill or capture the man who gave $10.5 million to a traitor who killed an American soldier.
Don't even have to do that, just walk in and arrest the government officials and put the PCC in power. Promise a full military pension to any Canadian servicemen who don't fight.