As long as the occupation of Palestinians continues, peace will not be had.
When Palestinians' demand for a free, independent state is no longer vetoed at the UN by the USA, there will be a higher chance for peace in the Middle East.
When potential enemies of America and Israel can no longer claim the occupation of Palestinians as their motivation for their violent actions against the USA and Israel, there will be a higher chance for lasting peace.
When there is peace, there is trade, employment, and exchange of ideas - followed by a cycle of peace, not a cycle of violence as we have been seeing for decades.
If we want to get to the bottom of most our troubles, we absolutely cannot let the occupation of Palestinians to persist.