I'm talking about what appeared to be a prolonged level of abuse, by the account I heard. Is it right, no, of course not. Can I understand why he reacted, yes.
This I take personally as I witness it from time to time. I heard a fan at a county level game recently shout "don't let him do that, break his f***ing legs", my Son is 16, I'm never going to allow that to go unchecked, wrong, maybe ..... understandable, probably. Did it make any difference? He stopped shouting it and MAY think twice next time.
I understand your protection of your son. Although what would you do if he was an amazingly gifted lad and was playing at L1 level? Offer out every critic in the ground, or only the 2500 Leeds opposition fans who were calling for his leg to be broken? Once in the big time a player HAS to accept what comes with it.