There are several things that can be done to terrorists captured by Israel. The first thing is create “secular incarceration”, with no respect for their religious demands at all.
No Halal food, no beards, prison uniforms, individual prayer in cells only. If and when they die, they are buried on prison grounds, with just an ID marker over the site, and no ritual. Family notification of death within one month after death.
If prisoners wish to starve themselves, they can do so in solitary confinement with no press release or notification to other prisoners. At random, one of a group of hunger strikers will be force fed with highly nutritious food, like bacon grease and pasta, to the point where they obviously gain weight.
You’re being too kind, good sir.