So, if I am understanding correctly, you are suggesting that US doesn't get involved - and the folks at the WTC who survived and the friends and relatives of those who didn't can go find those responsible wherever they are and do as they please with them? Basically sort of an anarchy and vigilante justice.
Well, yes, I understand you passionately dislike the guy, but that's not the question here, is it? If you were the only person eligible to elect the president of this country you'd have whoever you want. But as it is there are upwards of 200 million people who get to judge people's leadership abilities and this time around the majority does not agree with you. You can complain all you want, but that's the system that the founding fathers set in the constitution and if you don't like the results you really ought to blame them, or better yet offer something that would work better.
Well here's the text of the constitution with all 27 amendments that were added afterwards, most of them before you were born:
U.S. Constitution | Constitution | US Law | LII / Legal Information Institute
I'd say the second one must be one of the worst since its meaning keeps being debated to this very day.
I don't think anybody means any harm here, and I like asking questions, particularly when something is implied to exist yet it isn't shown.