I note that I somehow made it through my own junior year of high school without advocating that anyone ought to, in Kashuv's words, "Kill all the fucking jews." or "fucking make a CSOG map of Douglas and practice"; if such a thing were lurking in my recent past, I would not be surprised if it cost me a college admission later, genuinely regretful though I might be. Upset, sure, but not surprised, and I would know it was hopeless to try and fight it. What's he gonna do, sue to gain entrance? They'd eat him alive as a student just as surely.
Part of becoming an adult in the post Millennial world is understanding that 1.) there's not much tolerance for overtly genocidal or pro-mass-shooting sympathies in the public sector these days 2.) the internet never forgets.