He did what a depressed disillusioned soldier could do. Should we encourage more soldiers to off themselves? They already have been for decades. If one wanted to effective sabatoge for Israeli occupation in particular, he'd have to reinlist but there is no guarantee that he'd be stationed in israel to be in proximity to sabatoge the operation. If he spoke the local languages there is a chance he could try to work with Hamas, but there is a high chance of rejection because this could be a way to inject a spy in the most obvious manner as far as Hamas understands.
Being socially alienated also makes it difficult to coordinate to do a more effective sabatoge. Had he done something less desparate he might have been able to share his millitary insights to improve the protests. He could have worked to be an effective propaganda tool for longer if he could keep his record clean. With that he'd be supported and alive. But he was so alienated that he'd dead now.
Choose 1
Subsidize unhealthy foods like sugar to make profits for agriculture corporations
Have a population of fit and healthy people to train for battle