I've been reflecting upon what to seems to me to be an inordinate lionisng of youth in recent years and this adds to, but also stems from, in part, the big generational divide that we are now constantly told exists. We are told older people have all of the privilege and younger people have been left out in the cold.
Increasingly we have very young local councillors ( one in my city was just 19 years old on election) and also MPs. Greta Thunberg became a spokesperson for the world in her early teens and very one hung on her every word. Scotland has been wanting to give the vote to 16 year olds for a long time.
Perhaps some older people feel guilty for their supposed privilege and so are inclined indulge youthful idealism. I know a lot of older traditional leftists are left baffled by the 'woke' ( what I consider to be U.S originated Campus ideologies and theories) politics of the younger Momentum crowd, but just go along with it and don't question it too much. they consideer these issues side issues in a 'manufactured culture war'.
As you suggest most young people get caught up in idealistic political or social movements, as this is the nature of youth, as I'm sure many of us posting here did too. Young people always believe that they are the first to see, or to reveal, the secret hidden inner workings of oppressive structures and so on.
But what is different in today's 'woke' politics is the deep radicalism that is on display and one that is totalitarian and authoritarian in nature and tolerates no dissent. Like others have said it is zealous in nature and clung to like an article of faith.
I think it will recede with time, but we are talking about 20 years or more - as the dark aspects of these ideologies become ever more evident. But in the meantime there needs to be a continual push-back and challenge to help it on its way.