1. Mandatory car insurance is liability insurance. It's for the irresponsible driver who inflicts injures on another person. If you want car insurance on yourself and your car, there is no mandate. Completely different from Obamacare which mandates I pay for other peoples 'irresponsibility.
2. California did a study and found that even with the auto insurance mandate 10% still didn't have auto insurance: The same percentage of people that don't have health insurance. They identified the characteristics of this kind of law breaker. They found that they are the same kind of people who wouldn't buy healthcare insurance.
Please do a little research.