1) What would happen if all the Arab nations and their terrorist proxies like Hezbollah set down their arms and gave up their ambitions to drive Israel into the sea?
There would be peace in the Middle East.
2) What would happen if Israel disbanded the IDF, junked its nuclear weapons and declared to its neighbors that she would do anything to live in peace?
Israel would be annihilated, millions of its citizens killed. The term genocide could be used to describe the ensuing holocaust, but since that term has been so hopelessly debased by American academics, a new term would have to be created like super-duper-mega genocide to really capture the nature of things.