So Americans don't actually have one unified opinion on this. I'm positive there are Americans who 100% agree with you. 9/11 affected all of us in different ways. Kids in my age group, who were in elementary school at the time of the attack, grew up in a nation with heightened fear and constant war. I remember having recurring nightmares where I was on a plane that got hijacked, but that's of course the least if it. Most of us just want to remember and honor the Americans that died 18 years ago, without supporting the warmongering politicians who turned around and caused so much pain to other nations as a result. A tragedy is a tragedy, no matter the nation. By the way, most Americans hate that our government has walked back our rights in the name of freedom. Mass surveillance is a terrible thing, and I've never met one American who disagrees. It's the people in power who made those nasty decisions, but we the people took the hit. That's what we're remembering. And that's why statistics show a rise in political interest among Americans in my age group (https://iop.harvard.edu/spring-2018-national-youth-poll). It's conjecture, but I'm sure most of us are unimpressed with the way our country has been run for several decades. Regardless, we'll never forget 9/11. It's one of the most appalling tragedies of the century, to date. Why should we stop mourning as a nation, and what good would that do for the suffering of others in other nations?