Removing the Violence or Covering it Up? Classical Conditioning in Clockwork Orange

The Ludovico Treatment used on Alex, in the movie Clockwork Orange, is a clear example of classical conditioning. This type of conditioning assumes that when a subject is exposed to an unconditioned stimulus, the stimulus elicits an unconditioned response. The subject is then exposed to a neutral stimulus at the same time as the unconditioned stimulus. The subject learns to associate the unconditioned stimulus with the neutral stimulus, thus both stimuli resulting in the unconditioned response. In other words the neutral stimulus alone becomes the conditioned stimulus and results in the conditioned response. As I previously stated the rehabilitation of Alex is a perfect example of classical conditioning. The diagram below demonstrates this:

The above video gives a glimpse of the Ludovico Treatment used on Alex.

Alex's treatment consists of begin inject with drugs that cause nausea and then to be forced to watch movies of extreme violence and of rape put to the music of Ludwig Van Beethoven. In addition Alex is put in a death like paralysis via a straight jacket, hand and leg cuffs, head restraints, and even clips to keep him from blinking. After weeks of treatment Alex's conditioning is shown off to a skeptical audience. During this exposition Alex is incapable to retaliate against an attacker or to touch a half naked women, because of the nausea that takes over. Alex is then released from jail because he seemed to have lost all inclination towards violence. Alex is unable to defend himself from attackers after he is released and he also is unable to listen to his favorite music without becoming sick. However in the end of the movie Alex commits an act of violence once again. This brings about the question of whether conditioned behaviors are really stronger then the workings of the mind. Or put in context, did Alex's conditioning really purge his violence or did it only become a temporary barrier for his violent nature. If this were the case then that would mean that classical conditioning is not capable of fixing a problem, it can only cover it up for a while. So classical conditioning then, can never be fully maintained, and if a subject is not exposed to the stimulus for a period of time the response evoked by that stimuli weakens till it is non-existent. I would be interested to know how the rest of Alex's life turns out. Whether he sticks to violent crimes or loses interest in such things. Does behavior conditioning really work or is it truly mind over matter ( or specifically behavior)?