The people of the world, much less just the US, have a sincere interest in preventing terrorism. The functional elimination of Al Qaeda and ISIS are both two things people should be celebrating. Many countries are responsible for their elimination, and we're all better off for it.
Unfortunately, both left and right wing propagandists are agitating to make you think it was unjustified to eradicate these two groups. Don't believe that garbage. These organizations genuinely believed that the entire world has been corrupted, including much of the Muslim world, and deserved the terrorism their groups inflicted.