Shipping 2.2 million people anywhere would be difficult. Where the Bible explicitly mentions Gaza, it is always as an area without Jews, so I do not know about the rightful owner part. Also Iran is not an Arabic country.
With land grabs the density of people on the land to be grabbed is important. The more people, the more trouble. The less land, the less it is all worth. Gaza has a population density greater than London or Tokyo. Basically, Israel would have to forcibly move/kill 2.2 million people for the reward of 141 square miles.