Part of the reason is the failure of our school systems to teach the history of Canadian resistance to U.S. threats, incursions and trade sanctions.
No way.
They are susceptible because they use "products" (i.e. social media) that's been specifically engineered to manipulate your opinions and worldview. That's by design, and young minds are more easily corrupted by it.
There is also a growing number of extreme right-wing, "alpha male" influencers who are specifically targeting young males through social grooming and manipulation strategies.
When you've got elementary school teachers overhearing their 11-year-old students talk about people like the rapist and misogynist Andrew Tate, you can hardly blame a lack of history education on it.