One thing that may be driving Alphonso Dunn is that, as far as I can tell, his Pen and Ink book and accompanying workbook are the only books he has published. I used to follow him on instagram and Youtube and with almost every post, he promoted those books. He's put all of his eggs into that basket and probably sees Jake's book as a huge threat to it. And there is no question that this controversy has increased his sales.
I have stopped following Dunn because as everyone has pointed out, his willingness to create an internet mob made me lose respect for him. I hope @Lee-White is communicating all of our support to Jake because I can't imagine how difficult this must be for him. I sometimes wonder if there have been times that he wishes he never started "Inktober!"