I think Trump exaggerated yes. I also think the media is guilty of covering it up. For the sake of Hillary or Political Correctness or rewriting history. Muslims definitely celebrated out in the open 9/11 deaths of innocent people. No doubt.
this appeared in the Washington Post on September 18, 2001:
In Jersey City, within hours of two jetliners’ plowing into the World Trade Center, law enforcement authorities detained and questioned a number of people who were allegedly seen celebrating the attacks and holding tailgate-style parties on rooftops while they watched the devastation on the other side of the river.
The New York Post
This appeared in a New York Post editorial written by Fred Siegel on September 14, 2001:
Here in New York, it was easy to get angry listening to Egyptians, Palestinians and the Arabs of nearby Paterson, N.J., celebrate as they received word of the murderous attack in New York and Washington. But Mayor Giuliani (who has been tireless and magnificent in this crisis) rightly warned New Yorker-ers that is would be wrong to take their anger our on the city’s Arab and Muslim residents. Attacks on Arab-Americans in Paterson or elsewhere are utterly indefensible.
Look @ the 12:30 mark
http://www.visibility911.org/video-dan-rather-on-david-letterman-1-week-after-911/