The most important thing is that Israel ends its illegal occupation of someone else's land, logically it could even do that without signing a peace treaty with the Palestinians though that would probably be an unwise move on Israel's part. History has shown that where Israel's has peace treaties with its neighbours, these have helped Israel. The settlements are ideologically driven, any connection between them and Israel's security is tenuous at best. For protection, Israel has one of the best equipped armies in the world. Israel is the master at always finding a reason why it is the wrong time to talk to the Palestinians. The civil war within the Arab world is the latest convenient excuse, in practice how many Israeli Jewish civilians - whether religious, nationalistic or simply after cheaper housing - live in the West Bank has no connection to the Sunni-Shi'ite conflict and everything to do with denying the Palestinians their own state.
In Qatar, Kerry seeks to convince Gulf Arabs on Iran deal (Reuters)
from the article: A prime minister in denial, leading Israel to the brink