Why has "blame the victim" become the American way?

How is it not their fault? If your poor, sacrifice and get another job so you are not poor. America is the land of opportunity still (as much as Obama wants to take that away from us). Go out and apply for jobs. If you are fat, go to a gym and get on a diet. No one is forcing you to eat fast foot, super-sized portions, etc. You are in control of you and shouldn't be looking to someone else to blame, let alone looking to the government.