My guess is that he gets excommunicated. I know that the math department tends to be very pro-Trump at BYU and they will not look on this kindly. I have already emailed Shane Reese, Clark Gilbert, and Russell M. Nelson. I expect action to be taken shortly.
Honestly though, I am unsure if he even knew what it was. It was some paper that a vigilante student taped to his door and harassed him with.