That phrase is often used by the upper class to justify their habit of telling the lower classes what's good for them and, frankly, is exactly what's led to them being willing to cut off their nose to spite their face.
As an example, "You didn't build that", while I get his point, it was poorly made and disregarded a lot of very hard work by the people he was talking down to.
That's why his supporters don't seem to care about his policies,flaws or ideology. They like him because those people hate him. That may look like cultish behavior because they change opinions based on his whims but I bet if he started acting like and was accepted by those "elites", his support would dwindle.
I think a lot of people look at the situation and don't understand it then just decide that his supporters must be stupid.
I think that attitude only covers a portion of Trump voters and might not be applicable to the Quebec decision but don't have any concrete data, Asimov's 1980 opinion piece on the USA may be more relevant to Trump voters and reflects most of the executive orders and appointments in 2025 so far: There is a cult of ignorance in the United States, and there always has been. The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that “my ignorance is just as good as your knowledge.”