I doubt it.
Money talks. I think you're over estimating how put off the international community would be.
No. Diplomacy has certainly rules that that are followed. Unilateral non negotiated departures aren’t viewed well. I’m sure Russia will support thought. Peaceful negociated exits generally work out though.
If they separated? Yeah. I don't think they will.
Yes. If you think they will just take stuff like you said.
The point that if the thought you propose is that they will just take what they want and we wouldn’t do anything about it then Canada would be absolutely correct in not adding any additional investment until the matter is settled.
How about this scenario.
Alberta pulls the trigger on a referendum a year from now. Great.
Meanwhile, the US is skittish about letting Canada put any F35s and related infrastructure in Alberta. But we reassure them that it’s cool. They then go ahead and start. F35s get delivered and all is gtg. Referendum vote happens and oops. Yes side wins.
Some separatist elements, say the base commander and some sympathizing CAF members who have been promised twice the pay and an oil patch job. Let’s call them fire team Q. They decide to just secure that stuff. As you said just take it. Now the gvt could direct JTF2 and CSOR to secure it but, as you said, you they wouldn’t do anything about it.
Then how long do you think it would take for say US Delta Force Rangers or whoever to drop in, disappear fire team Q, secure the assets and haul them off south? A week? No way the US will let a newly separatist state without négociation go rogue on military assets it still exerts some degree of control over. Especially one north of them.
Fun fiction.