This has been a trend across several countries now. Trump overperformed with young voters, and the only demographic he is wildly underwater with is Boomers. Boomers are the ones who elected the current PM in Canada, while younger voters went with other parties. All across Europe, the nationalistic parties like AfD are being overwhelmingly supported by younger voters while older voters keep voting for the old established parties.

There is clearly something to it worldwide, and it is why I think people dooming are internal saboteurs rather than actually important drivers of movements.