Iran seems to realize that they have vulnerable territory in the Persian Gulf:
"The security of the Iranian islands in the Persian Gulf is part of the various strategies of the naval force of the Islamic Revolutionary Guard Corps," IRGC Commander Mohammad Ali Jafari said, according to the website of state television IRIB.
Jafari was speaking at a ceremony inaugurating a fifth "naval defense zone" at the port of Bandar Lengeh. He said the IRGC was "increasing, expanding and improving the expert capability in naval defense" in the five zones.
I guess they are starting to realize the islands of Abu Musa and the Greater and Lesser Tunbs are vulnerable to US assault and we could gain Arab allies by taking them away from Iran.