You dont think that any sort of physical barrier would work? How could you think that? If you cant get over it, and there are armed guards that are guarding it, dont you think that it would prevent a lot of casualties? It would then allow the people guarding it, to be able to concentrate their forces in particular areas that would be more compromising.
You dont think that the violence in Ireland and England is just a little less than Israel? C'mon now. In addition to any sort of barrier, you wouldnt think that there should be a buffer zone between them? This would also make it 100 times harder to get in to the country.
You have to understand that there will never be complete peace there or anywhere, it just trims down tragic incidents a LOT. Thats all were looking for here. Peace will only come with time. And there needs to be an individual state for them in order to have that. For now, to seriuosly curtail the terrorist events, there must be more serious good old fashioned security in place. To say that putting barriers in place would do nothing, is obsurd.