The 'what will they do when a peace deal happens' shows your misunderstanding of the situation. A peace deal is a massive improvement on genocide, but it's not going to resolve the issues here. That can only be resolved when there is a fully independent Palestinian state, which has control over its own borders, coast, airspace.
A place which Israel doesn't bomb whenever it fancies.
A place where Israel can't control what the Palestinians eat, where they go, even whether their kids are allowed to eat chocolate.
The West Bank free of Israeli settlements and checkpoints.
The apartheid system currently in place dismantled.
Those held without charge in Israeli prisons returned (especially the children).
The option of a review for the thousands convicted before military courts that have a 99% conviction rate.
An independent investigation into war crimes committed during war, and those with arrest warrants being extradited to face trial.
Justice for the tens of thousands of Palestinians killed or injured by settlers whilst the police and IDF either look away or assist them.
That's what needs resolving. It's a bit more than Trump's 20 point plan.