Dear mr. Ramm (aka woodpeck),
I think it was better to undelete the relation "Terror Prevention Isolation Area" and than make a discussion about should it be kept or not.
The acts of user 3la2_ka are not respectful. I made a lot of contributions to OSM in Israel and the territories and it is very unrespectfull for a user without major contributions to come and delete my work twice, without any discussion.
Regarding the legitimacy of the relation "Terror Prevention Isolation Area": 
1. Gaza Strip is not "other country". There is no international recognized country that have sovereignty in Gaza Strip and as Israel entered this area, it is now the only sovereign power in the area and have the authority to define military zones in it.
2. The "Isolation Area" is fact on ground and it not matter of recognition from other countries. Israel plan to remain the only military power in this area so the status of the "Isolation Area" is about to remain in the foreseen future.
3. Check my editing history: I'm not just "Mapper from Israel", but I also mapped a lot in Gaza Strip, the West Bank, and Lebanon. I think it is my right to keep mapping Gaza Strip after it freed from the terrorist groups that controlled it until lately. 