The tendency to scapegoat is a constant of the human condition to be factored in like any other tendency.
Years ago I read a science fiction story that predicted organ theft would become common once it became more technologically feasible. I hope we are not approaching such a condition.
The tendency to scapegoat is hardly constant. Some cultures are far more prone to it than others. It needs to constantly be fought in order to minimize it. The best way to fight it is to emphasize personal responsibility, rationality, and fact.