Mr. Dawkins spare me. When a mechanical contrivance I own becomes defective I stop using it. The same position taken with regard to criminals is that you take them out of society so they cannot re-offend.
Of course our legal system introduces debatable concepts such as rehabilitation, but in the end, we're taking them off the streets so they cannot offend for a period of time. Nothing more, nothing less.
Also so they cannot pass on their genes and culture, at least for a period of time. In Darwinian terms, jail is for fine tuning the human gene pool, war is for drastic adjustment.
When and only when Richard Dawkins can show me a car that has free will, only then I might accept that Man has none.
While I await the impossible, I will continue to consider Dawkins as an ass fully responsible for his own assihness.