Yes, that's true - too.
Take my parents: they're boomers, they're well educated, they're left leaning (my mom, in particular, was a feckin' hippie back in the day) - and they don' t take the idea of good ol' fascism rising again seriously. They actually believe it can't get that bad - it can't happen again. They've been breast fed the idea that history will repeat itself unless...and still, in practice they don't actually, truly believe it's a real possibility.
And - they don't use Twitter.
But - a significant number of people who do protest against the rise of fascism, do so in the form of posting gifs on Twitter. It's not a bad thing in itself - but if you don't do anything beyond posting gifs and laughing at deluded Trumpers...