The best prophet of the future is the past!
We always see others’ behavior caused by their nature, ours by situation. We always like to take credit for success and deny failure.
We also blame others for our situations.
Who's to blame? Honestly, almost nobody is to blame. That's because almost nobody wishes you ill, even if they were curt with you, careless with your possessions or impatient with you in traffic.
Most people are simply doing just what you are doing...trying to get their business done and thinking about the next thing they need to do. They don't really wish you ill, nor do they wish you well. They are just too busy with their own affairs.
Who's to blame? Only the person who wastes his or her energy finding blame.