It's a myth that young people are inherently more liberal.
Wisconsin 18-24 year olds voted 47-43 for Trump if exit poll is to be believed.
By contrary, whites in TX, GA are getting more democratic.
Young people have tendency to rebel against parents thoughts. Hispanic and black youngsters won't go overwhelmingly Democratic forever. And likewise, older people won't be the most conservative one forever.
It always changes and one part of the reasons is that people always want to hit a reset button after certain ideology is in the throne long enough.
I saw an article that said that kids are rebeling against their parents by
being conservative.we had a Clinton Trump debate in one of my classes and the split was about 22-6 Trump-Hillary. All the Hillary supporters were female. This trend followed almost all other classes that had a debate, with overwhelming Trump support with a small cohort of more liberal woman who support Hillary. Gender gap trend iimcreases significantly.