While you can create spiracles that repel polar substances like water, you cannot protect them against surfactant like soap. No more showers unless you want to drown.
You're not a bank, the details don't matter. Don't even bother with getting anything in writing from someone who is over leveraged, because you're already never getting that money back in any court regardless since the other creditors come first.
You're missing one state solution. That's what's essentially going to happen as things go. They're depopulating gaza with the plan to eventually grant citizenship to the reduced population of Palestinians so they can maintain a jewish majority. West bank alone wouldn't cause a loss in majority, but Gaza would. They won't grant right of return. Though that is genocide.