The deep state realist policy requires a black letter end to the Greater Israel Project and a stretch goal of a two state solution. It means Israel never becomes a major power. Not in ten years, not in a century.
The practical argument is that jews can either take half a state or no state at all, because Iran can destroy them right now, and it will only get easier as technology improves. So coming to a negotiated settlement is the only option where Israel survives in any form.