What's yours is what you can defend and hold.
This is how animals act and once you make this statement then you invite car bombs and suicide attacks. You can't tell people "we are going to hold this land with all due force and kill you if you try to take it" then get high and mighty when your opposition says the same and violence commences.
Its a simple fact, the Palestinians HAVE to have their own country. Once that is established most of the arguments coming from arab countries will be quashed and over time the area will calm down. Once Palestinians are able to build a society and have some security and upward mobility where their children can succeed the desire for conflict will recede.
Until then all get what they get.
They already have their own country so why doesn't it work. Or do you mean when they have their own country and the Jews country as well.
By the way you can tell people that this is my property and I will defend it with my life to stop you taking it as it is enshrined in International law