Ask him how feels about Canada supporting Azov before the war happened

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I wish I knew more about Canada. Look through Canadian history as referenced by other countries or by the left in your country for instances which will demonstrate the true character of Canada to him. IIRC Canada as well as every other British colony was built on chauvinistic genocide of the native population. That can begin the logic of “Canada isn’t so different from America”. Then perhaps progress into every imperial war the US started that Canada also took part in and current economical overlaps. You should also explain the connection of economics and politics, how the later is an expression of the former.

As far as social democracy goes I would remind him that at one point the US was a social democracy, and nazi Germany was as well. If these skin deep arguments don’t work try explaining the economics of how social democracy always falls apart due to the falling rate of profit and how it never evolves into socialism but decays into barbarism (including neoliberalism aka what America is now as a form thereof) due to the complacency and alienation internalized by the pampered working class turned labor aristocracy in those nations. Then explain what the characteristics of barbarism are and why he doesn’t want that if hearing “it’s basically America” doesn’t work.

See how these and the other recommendations from others here work out, then reassess depending on results. Then perhaps report back and state “x worked, y didn’t, what now” or something to that effect?

If you are looking to convince them in one sweeping motion (although I’m not assuming you are, but just in case), this is impossible to do.

Start with one topic at a time and use more prodding methods.

I’ve tried using more direct methods about countries like Cuba or China, which my family believes all the usual US lies. I would just sit down and blast away and my family quite frankly hated me for it. They are well educated and really do not appreciate having lopsided (lopsided as in I literally know more than them) arguments like that. They have egos and so do I, so I never really backed down even when I wasn’t the one who brought up these topics.

But this never works. The changing of a person’s whole stance is impossible to do overnight. Pick a single topic to tackle together with your dad as an equal. Don’t use argumentative beat down tactics that you can only really use online. Eventually if they have been convinced on enough topics over months or years (they might even go off on their own and discover more stuff which is great too), the bigger change of position will happen on its own.