I don't doubt it (although I am not going to run through any of JBs tweets to prove it) , hence why I hope he is punished financially at the least. I think Barton's problem is largely due to feeling his own failures are due to being "cheated" out of things that are rightfully his - a commentating gig because sky/bbc etc have gone for ticking boxes rather than bestowing his intellect on the sporting public. Other peoples success , whatever color or creed , gender or nationality fuel his anger and bile.
Have come across many like Barton (but most without the violent tendencies) who will always have a reason why someone has been more successful or achieved something they have not that's related to some form of unfair advantage rather than any failings themselves.