If it's a "truth" then you should be able to prove it....but you can't.
I don't like Rex's antics, at all. But not because of the other team's reactions, but because it effects his own team's focus, and attitude.
I think the Jags had plenty of other things to motivate them, and that Marrone has probably never even spoken to most of the guys on their defense.
Half the games each week involve a player or coach that played/worked for, or was cut/fired by one of the teams. Or the other team beat them badly previously, or any number of circumstances like that. If anybody should have been inspired by Marrone's presence, it should have been the Bills. But of course, they only would have said it if they won.
Rex hurts his own team by making claims in the player's names. He tries to set the standards for the team with public proclamations. That is the problem with his antics.