Hooray for voicing your indifference. I was irritated by others' expectations of me to observe, remember, or memorialize on their terms - if at all.

Perhaps you are implying that you did not know anyone personally who died from the attack, as is the case for myself and most of those I know (all, to the best of my knowledge actually)...? I was deeply affected by the incidence, though knew no one who died or who was even there. I did know people whose travel was adversely affected.