The Islamic terrorists of 9/11 and their supporters of any stripe or level are evil.
Like the Israeli's hunted the Nazis, we should hunt down al Quaeda unto eternity, just as was done with bin Laden. The pressure should never be lessened. The whole world should know what we are doing. That will isolate the targets; few non-terrorists will want to hang with them lest they become collateral damage. As recruits join the al Quaeda crowd, they are put on the list. Forever. Until they are all dead and gone.
Support them and you are a dead man walking.
That is my commemoration of 9/11.
It is known as Justice.