Blaming others for your troubles is ingrained in human nature. It's easier. Otherwise, you have to own up to your problems and actually put work into figuring out how to fix them, then even more work to apply those fixes.
Furthermore, Blaming others is a good way for someone who is power hungry to achieve that power. Biggest case in point that I can think of, Hitler. By Blaming Jews and the West he solidified his position of power over the Germans.
So you've got a group of people that want to blame others, and another group which wants to blame others in order to exert control over the first group. Thus no one wants to look at the actual problem, and figure out how to fix it.