Because Hillary and Trump are the same. Except that Hillary lacks the charisma Billy Bob had. And the only thing needed to prevent Iran from attacking Israel is to have Israel not attack Iran. AKA Hillary was courting the Jewish vote, donators, and lobbyists with her statement. You can tell Joey down the block that if old Mrs Hubbard tries to attack him, you'll beat the crap out of her. Doesn't mean anything because she's never going to attack him in the first place. It's a bs promise.
We told Eastern Europeans that we would back them if they went up against their Soviet occupiers. When they did in Hungary in 1956, we stood by and watched them get killed. When they did in Czechoslovakia in 1968, we stood by and watched them get killed. We told the Kurds that we would back them if they went up against Sadam Hussein. When they did, we stood by and watched thousands of them get gassed to death by him.
We told Kurds that we had their backs when they fought ISIS in Syria for us. Then Trump ordered the soldiers to leave them so they can get slaughtered by Erdogan. Meanwhile he took the credit for fighting ISIS, when all US soldiers did was have a base nearby to let others know that the Kurds were hands off.
Despite the fact that we've been waiting for it since 1979 and a painted them as the world's most dangerous country and biggest sponsor of terrorism on Earth (we needed another country as backup and then to replace the Soviet Union as the evil anti-Americans), they never did attack us as we pretended they would, at least not without prompting, like in 2020.
Unless you include of course, the hostages that they kept from 444 days. Granted, not to justify it or say it was a pleasant experience to go through, but it was the most civilized act of aggression carried out by any country on the US. In history. We've never had so much as an American tourist get overcharged by a taxi cab in Iran.
Trump attacked Iran for no reason. Israel attacking Iran for no reason, and everybody knows Trump had us as part of that first wave as well. Last anybody checked, attacking someone for no reason does not exactly make them them good guy.