John Kerry deserves our respect and gratitude for the years of effort he has put forth on behalf of the USA attempting to broker peace between Israel and the Palestinians. His speech did an excellent job of educating us all on the history of this ongoing issue which is one of the main flash points between Israel and the Arab world. 
It is obvious to all who have studied this, that the choices boil down to a Two State solution or continued conflict between Israel and the Arabs. The Two State solution is something that Israel itself professes to believe in, the global community is unanimously in favor of and every US President at least since Reagan has fully endorsed.
If the path to peace is blocked or is completely destroyed by Netanyahoo and Trump - or by Hamas and the Palestinian Authority - War will certainly follow.