Justifying the action of a security guard (not an official law enforcement agent) in the use of excessive force leads to justifying excessive violence against innocent citizens. You cannot on the one hand say that the force is excessive and on the other hand say that the criminal deserved it. So either you stand by the judges decision, and the reasons are quite clear, or you believe that kicking a person in the face while they are being held down is a reasonable way to subdue someone.
I would say that excessive sympathy for habitual criminals leads to more habitual criminals. In the case of this shoplifter, he he stole a car just a day or two after he got his $12,000.00 award. By all means punish the security guards for the excessive force, but let's not lose sight of the fact that those security guards did not cause the shoplifting.