>>17879145Because being accepted into team evil was more important to him then riding it out with Letty. Which is kind of hypocritical of Jon, considering that both Sylvia and Damiel are no better or worse than Letty if we want to judge them based on their past and life choices. Jon essentially was manipulated by team evil to go against Letty, which I find ironic considering they were telling him Letty was trying to manipulate him instead.