the best way to convince him or his parents that he should come play for BYU. I would avoid the personal, "Utah sucks" messages that seem like they will only stoke the fires of fan partisanship and evoke the emotions his family may have felt in the past related to the rivalry. If he's going to come to BYU, its likely going to be because he decides that BYU has great things that may allow him to achieve his goals more than being at Utah . . . but if I were him, I wouldn't be that stoked about a bunch of BYU fans telling me how pathetic Utah is.
Again, for what its worth.