The problem with the Iran peace deal is that it implies that Israel will abide by its terms. The U.S. is not managing, and never managed in the past, to keep Israel under control. I don’t know what can possibly save the deal from collapsing. It was good, though. The oil and the gas prices started getting very pleasant.
To avoid such debacles in the future, it would be great if the American government sought advice from qualified people who understand cultural differences and regional politics.