The state of Palestine is not recognised by the west and the leadership in Gaza is Hamas who are a proscribed terrorist organisation. We share zero values with these types of people and it would be like negotiating with ISIS. Therefore of course the west in particular is going to sit back.But why would the Palestinians ‘leave them alone’. Why should the Palestinians have been made to pay with their land because of Europes anti-semitic crimes. Why would they leave them alone as during the course of those 75 years more and more land has been systematically stolen, whilst countless innocents have been brutalised and murdered. All the while the rest of the world sat back and has allowed it to happen with zero recourse for the perpetrators? Where has diplomacy got them in the past 75 years?
Giving back land doesn't solve the problem either, the problem runs deep into how you get a designated state of Palestine and state of Israel. A negotiated two state solution is the only obvious solution but to get it you need sane and calm people on both sides of the negotiation table and currently there are neither.
The problem is a majority of Palestinians and Israeli's think that either has no right to exist or at least oppose two states or a vastly reduced state. Therefore what else can we expect from the people they elect?