IcyGamma can be completely decent when he's having a conversation or commenting on an article, but when it comes to grudges and insults, and not to mention profession, he comes off as arrogant and ill-informed.
In a technical sense, if IcyGamma is going to become anything in the career world, it's going to be either an author or an executive.
He's a lone, ferocious wolf. Perfect for individual projects.
I'd just cut him a break and ignore him; he functions best without instigation.