Why the f*** is 9/11 still such a big deal?

First off, I know it was horrible and very tragic but Americans act like it was the worst attack on civilians in history, and it BY FAR IS NOT. Have people forgotten about Hiroshima and Nagasaki? Possibly more than 246,000 innocent people who had nothing to do with war were killed. And if u don't think it was like an act of terrorism, you're stupid because those weapons caused so much psychological damage to the people involved it's unimaginable. Or how about "blockbuster bombs" used in WW2. First bombs would be deployed onto a city breaking windows and roofs of civilian buildings to pieces. After that incendiary bombs would be dropped onto the kindling that was now the buildings, lighting everything flammable on fire including innocent people and killing more than 200,000 in one city alone. Those are just two of countless gory attacks on civilians in even just post WW1 times. I mean yes it was very sad but TONS of other countries have had countless innocent civilians killed in terroristic ways but none of them think it was the worst thing ever to happen to anyone. They know it wasn't and if u don't I'm surprised u can still breath by yourself.