It that really what you think happened?
It seemed to me that he got in a huge pissing match over 110v welders and recommending that some 70 year old woman needed a 230v welder and then started insulting peoples welds and calling them hacks after looking at pics they posted of projects they had done with thier 110v welder. Basically going to great extents to be an all around jerk about it and when he got called out he threw atantrum like a child including cussing and took his ball and went home never to return.
I have no doubt the guy is really talented and has helped many people but his bully mentality and insults turned negative and extremely immature toward the end. It's unfortunate that he could not simply get over the 110v welder pissing match but he escalated it to a point where he felt the need to leave instead of simply letting it go and moving on.