Swedes mostly don't care.
Me and my friends, a lot of the people I know, and others find the memorial..... untasteful, for lack of a better word. Americans spend an entire day for these 3000 people, yet nothing for all the hundreds of thousands of civilians America has killed? Or Guantanamo bay, which coupled with other such facilities has over 3000 people interned? Or for the lives of others that have been destroyed.
Also, we find your general patriotism vulgar. Since 11/9 is closely associated nowadays with American patriotism, we find it a bit vulgar. And shameful that America props this event, as America being a great suffering victim, yet does next to nothing for those who have suffered greater tragedies.