Blaming others for their own made mistake

Every person in this world behaves according to his/her personality, their thinking level, etc. Sometimes it bugs others, when they try to reveal themselves and do awkward behaviors which they like to do, but others not. Taking before asking, no signal on lane changing, swearing at public places/roads are some of them. Blaming others for their own made mistake irks even more. Last Wednesday, while coming from a pizza shop at McPhilips Street, a SUV driver cuts into our lane without checking his shoulder and without signaling his intention. My brother applies brakes very hard and our car was almost about to hit. Thank God that it stopped with two- three inches of distance from that SUV. What he did after that was so annoying. He starts swearing and threw water bottles at our car and then he blocked his own lane. I was thinking to get off the car and knock him down on the road. But we did nothing like that because if we started swearing back to him, what would be the difference between him and us. People are engaged in this behavioiur when they don't worry about rules and regulations in the society, when they try to show that they know better than others, when try to show that they are always perfect, there is no chance that they can make a mistake. They could be aware of their behavior, but not all of them who are engaged in this behavior. This kind of behavior happens when someone gets nervous after making a mistake in front of the public. May be when people of rich class society blames middle class person because they don't want to get disrespect in the society (to maintain their status). May be as said above that they think, they are always perfect, there is no chance they can make mistake. First of all, people should live a simple life. A simple person is way more richer than a fashionable person. Most of the people's behavior bugs others when they try to do fashion. A simple person has high level of thinking and have good manners. Second, they have to understand that no one is perfect in this world. When they think opposite to this, they get engaged in this behavior, which really annoys others.