People spend too much time finding other people to blame, too much energy finding excuses for not being what they are capable of being, and not enough energy putting themselves on the line, growing out of the past, and getting on with their lives.
When something happens and is not your fault, it's natural to blame others. It is a natural reaction but you shouldn't let it be the only action you will take. Spend more of your energy fixing the problem than to blame others for it. After all, if you're blaming others for it, it means that it is important. :)