How are we to know the explosives are fake? If I see someone with an "explosives" belt, they're gonna get shot...Period. I'm not going to risk my life and the lives of my loved ones on the chance that they were a "protester".
Ultimately, however, homicide bombings will only continue as long as the perceived benefits outweigh the costs.
To change THAT equation is going to require the West to adopt much harsher actions in the advent of such bombings. The retaliation for such a bombing must be as brutal and as horrifying as the bombing itself -- and must be precisely targeted.
Homicide bombers are going to have to be made aware that their family -- their loved ones -- their property will face immediate and sure destruction should they blow themselves up.
The leaders of those organizations conducting the bombings -- including Arafat, every one of his deputies, and the leadership of the PFLP, Islamic Jihad, Hamas and the rest of Fatah -- need to have it impressed directly into their skull that the next homicide bombing traced to their organization will result in their deaths. That goes most specifically for that "shiek" in his Gaza wheelchair.
A lot of people have tried to claim that homicide bombings are acts of desperate rebellion by lone actors, but this is obviously not the case. In fact, if it were the case, the suicide bombings would not be anywhere near the threat they are. Sickos like that are relatively easy to detect.