Because nobody trusts the US, the possibility of a catastrophic mistake is higher than it was during the first Cold War. From Paul Craig Roberts at paulcraigroberts.com:
According to news reports, the validity of which cannot be ascertained by the general public, a crazed US government came within 10 minutes of igniting a general conflagration in the Middle East, the consequences of which could have been catastrophic for all.
The moronic warmongers in high office—Bolton, Pompeo, and Pence—and their Israel Lobby masters are determined, and they have not abandoned their campaign for war with Iran. Of course, the liars say that Iran will just accept its punishment for defending its territory and there will be no war. But this is not what Iran says. I believe Iran.
Some of the tiny percentage of people in the Western World who are still capable of thought regret that Trump called off the insane plan. They think the consequences would have been the destruction of the Saudi and Israeli governments—two of the most evil in history—and the cut-off of oil to the US and Europe, with the resulting depression causing the overthrow of the Western warmonger governments. They believe that catastrophic American defeat is the only way peace can be restored to the world.
In other words, it is not clear whether Trump calling off the attack saved us or doomed us. The Israel Lobby and their neoconservative agents have not been taught a lesson. Trump has not fired Bolton and Pompeo for almost igniting a conflagration, and he has not dressed down his moronic vice president. So, it can all happen again.