User blog comment:B214/Chapter 500: Fire and Ice/@comment-2214433-20160905163259/@comment-7418318-20160905191556

Additionally Invel already forced Gray to fight one of his friends.

Now that Invel is beaten and can't force Gray with magic any longer, he tries to make him do the same thing with words this time.

And Gray is just supposed to go ahead and do it? No amount of anger and hurt justifies believing Invel and dancing to his tune in that situation.

Yes WE know it's the truth, but Gray has no reaon to believe Invel and EVERY reason to mistrust him and assume that he's just trying to repeat with words what he already did with magic earlier: Playing the FT mages against each other to weaken them and then have an easier time taking down the "winner".