Most of all is the sense of rage felt that day, and the phrase "Never Forget!"
And yes, I can blame an entire subculture: islam. All 5% of them (60,000,000) who either participated or supported the killers, and the other 50% (600,000,000) who celebrated the atrocity, and would have participated or supported it directly had they had the chance.
Nothing will change my mind about the numbers, as true today as they were in 2001.