Irans New Best Friend is Vladimir Putin. He began by selling Iran 25 SU-35s. They are equipped with R-37 air to air missiles which can take out an F- 16 or F-35 at a distance of 400 kilometers (268 miles.) American air to air missiles are only effective up to 50 miles (80 kilometers.)
He also updated Irans air defense system to the S-400. The US spends 100 times as much on the military as does Iran. Total US military spending is $1.51 trillion if you count all 6 of the other agencies where Washington hides their military budget. The Department of Energy pays for part of the DODs nuclear energy and weapons. The US Patriot II air defense system is highly inferior to the old Soviet S-300 which made its debut 46 years ago in 1978. There is so much corruption in DC that Americans are poorly defended even though they spend a trillion and a half dollars a year.
Putin also gave the Iranians long range radar so there will be no surprise attack. And the Murmansk BN is a state-of-the-art Electronic Warfare system capable of jamming US and Israeli radar and electronics. For the time being, all that new equipment will be manned by Russian pilots and technicians as the Iranians are still being trained.
Russia also gave Iran the Mach 12 Kinzhal missile which digs a hole 98 feet (30 meters) deep where its target used to be. They also gave them the Mach 9 Zircon cruise missile. Ansar Allah of Yemen and Hezbollah in Lebanon would love to make some of those Zircon cruise missiles in their underground shops. The US Navy would definitely have to leave them alone.
Iran gave Yemen their Mach 14 missile which they copied in their basement producing a Mach 10 missile far superior to any American one. They have used this already against Israel.
. So, even a minimal Israeli attack will shock the Israeli military, the world and especially the people of Israel, because they see all those previously unstoppable Israeli jets falling down into the Persian Gulf.