Take on the pentagon menu options

Pentagon officials put the assassination of Suleimani on the table as a far out menu option they never expected Trump to take but when dealing with a lunatic, you can't possible take anything for granted
Trump apparently went along with the initial option which was likely targeting a lower level guy but last minute decided to go nuclear and go after a man who was thought to be untouchable precisely because the retaliation from the Islamic Revolutionary guards was expected to be so brutal

The lesson here is

Don't offer your kid ice cream if you don't want him to eat it, don't leave a pot roast on the table and leave your dog at home for the next eight hours and expect to eat pot roast that night and don't give Trump options that could start WWIII if you aren't prepared to fight it.