I don't have the time to read all of the posts---BUT
This one is simple. A bad pilot making a big mistake.
Low time--incompetent--tired.
How many checkrides do you fail before you are ****canned??
ALPA is the biggest part of this problem..They enjoyed the competition for "mainline"routes between the regionals and the majors for years. These are the same assholes who fought the age 60 rule because of "safety concerns"
Give it up--admit it--this accident was going to happen.
If things don't change, it will happen again, and again