it seems they mainly eventually grow out of it
Not all of them. In the left-wing riots 'supporting' Palestine that I saw on TV over the weekend, some of them were in their 50s and 60s. Over privileged, lazy, middle-class, probably had an education but not a scrap of common sense, and very likely couldn't point out Palestine on a map. Bet they have never met a single person from there - ever, and wouldn't know one if they bumped into them in Tesco.
This is all about rioting, and spoiling for a rumble, and accusing anyone who doesn't think like them of being racist, bigoted, and as 'thick as mince.' Because they are spoilt, over privileged, bored, and a bit dim.
@MyHeartyCoralSnail I 100% agree with everything you say. The majority of them don't 'care deeply' about Palestine/Gaza, they're just jumping on the bandwagon to look all 'right on' and 'woke.' We see them..... 👀