Man what's weird is that I was waiting on rappers to say something but it took a minute. Keep in mind this was before people would drop tracks immediately online and on tapes and there was just so much about 9/11 from the larger political and social aspect that I felt like rappers would wanna speak on but it took a minute
First responses I remember that year in the months after was Petey Pabolo doing that USA Remix of Raise Up (Dropped a month after 9/11) and that was just a patriot ass song.
Then Nas talked about it on Stillmatic on Rule and kind of on the My Country's intro and on Poison just lamenting on how it was just bad for everyone, war must not spread and that even America now has it coming to them
And then Ghostface talked about it on the Iron Flag album more outraged that someone did that in NY
And I believe that same year was when KRS did a lecture at a college saying the Native American applauded at that happening (That was hot hotep thing to say at the time: That America had it coming to them for all the injustices no disrespect)
Then the next year you had more talk. Obviously Juelz shouting out one of the bombers, Kweli rapped about the double standard America on terrorism on Quality album and J Live had a dope verse about how shyt was only gonna get fukked up