I'm less interested in this generation's perceived intolerance and more in what seems to be a generational embrace of "control and order" at an age range where typically the cohort is generally all about "freedom and fighting the man". The preceding generations have issued a blueprint that they start pretty "liberal" and they end pretty "conservative" as they age....hell the Baby Boomers were hippies and free love and all that back in the 60s.
I gotta think the control they grew up with from devices monitoring them as they slept as babies, helicopter parent syndrome, where all their battles were fought for them, the control of phones and reduced ventures into the outside world, the control they themselves have to exhibit when they do go into the outside world because something (a phone) is watching them, recording them all the time and mistakes of my generation's youth stayed local while theirs can be put on display for all the world to see, etc all have some part to play in why "control" feels more comfortable to this age group.
That embrace probably only deepens with the Alphas.