Iran can send a freight there with a bomb or attack assets in Europe or the middle east as they do now.
Also, you may not realize Israel is an ALLY. That used to mean something when we had honor and determination. How even conservatives pee in their loans at the thought of stopping the worst supporter of terrorism in the world.
Some ally, we give them $5 billion a year, and they reward us with their relentless spying, selling secrets to Russia, selling tech to China.
China Is Spying On Israel to Steal U.S. Secrets
https://foreignpolicy.com/2019/03/24/china-and-russia-are-spying-on-israel-to-steal-u-s-secrets-putin-netanyahu-xi-haifa-ashdod-iai-elbit/
US accuses Israel of ‘alarming, even terrifying’ levels of spying
https://www.independent.co.uk/news/world/americas/us-accuses-israel-of-alarming-even-terrifying-levels-of-spying-9341264.html
Israel Won't Stop Spying on the U.S.
https://www.newsweek.com/israel-wont-stop-spying-us-249757
No, it's not. Israel is no different than any other country that may have some common interests with us but does not justify any special, far-reaching foreign/military policies for this country.
NATO countries are allies. SEATO countries are allies. Etc., etc. The U.S. actually has common defense obligations with the member countries of these organizations under the treaties that established them. We have no such obligations to Israel except in one very limited circumstance with Egypt as a result of the 1976 Sinai accords. And we have the same obligations to Egypt under that agreement, too.