It's remarkable how easily fascists can be aroused to anger and hatred against people who they considered friends mere months ago.
Right-wing social media is full of Americans saying that they don't need Canadian products, don't want Canadian products, and intend to boycott anything from Canada. They're trying to cancel our entire country, when they had no such anger at us just a few scant months ago.
Trump says "these people are our enemies now" and his followers obediently start burning us in effigy the next day. This is what a hate-based movement looks like. They thrive on hate: it is literally what brings them together. That's why they're so easily moved to hate someone they had no problem with yesterday. They enjoy it. They KNOW it brings them together, and they love the feeling.