> Then peaceful protesters destroy the old fence, and we are back to square 0.
Shooting people who cross a border without permission, while also not
optimal in the case of peaceful protestors, is quite different than shooting peaceful protestors on the foreign side of your border in a territory you assert is not occupied and which further claim you have disenaged from and are not exerting control over.
Israel limiting its arbitrary murder zone to Israel proper would, while still arguably acting immorally, be at least acting consistently with its claim to have disengaged from and ended its occupation of Gaza. Baby steps.
The common idea of how borders work relies on the fact that borders are mutually recognized, and authorities on both side of the border collaborate to keep the border secure. This way you can maintain the exclusion zone in no man's land.
Border between Gaza Strip and Israel on the other hand is not even officially delineated AFAIK, it just de facto exists where the barrier is. So if you make a new barrier 500 meters away, and let the old one be slowly destroyed - as Hamas is not interested in maintaining it - it doesn't change anything, except the de facto border is now 500 away from the old place.
Shooting people who cross a border without permission, while also not optimal in the case of peaceful protestors, is quite different than shooting peaceful protestors on the foreign side of your border in a territory you assert is not occupied and which further claim you have disenaged from and are not exerting control over.
Israel limiting its arbitrary murder zone to Israel proper would, while still arguably acting immorally, be at least acting consistently with its claim to have disengaged from and ended its occupation of Gaza. Baby steps.