multiple state syndicated show he did several years ago on radio out of WFNZ in Charlotte. It was entertaining due to the "characters" he had on the show. That was before he went to Sirrius XM. Basically, he and the station couldn't agree on a new contract and he left. Anyway, on that show he was REALLY crappy to callers. I must say, on the TV show he has totally toned it down, but he inherited his arrogance gene(s) from the old man, Billy Packer, who was said to be horrible to deal with.
So it does not surprise me that he could be that way on Twitter.