Consider reading what you just wrote, perhaps looking in the mirror, and reevaluating your thought process. Even for Hacker News I expect better than this.
We've had to warn you many times over the years not to post flamewar comments to HN but this is a degree of shocking I wouldn't have expected from you or any other longstanding HN user.
So yes: 9/11 was quite deserved in the sense that we poke(d) our dirty noses in other peoples' (Middle East's) business. This is separate from civvies getting caught in the crossfire, which is tragic regardless of blame; there is a reason deliberately targeting civilians is a war crime.
For another example: Germans who ultimately voted for Hitler and the Nazi party and thus played a role in the Holocaust, among many other travesties.
They support(ed) Hamas.
While I hate the thought of civvies getting caught in the crossfires of war, to say they are/were completely unrelated is a false statement.