Why would there be videos??
Because Trump said he saw video of it.
There could be videos. How many people do you to know that have videos on their phone from 15 years ago? I don't know any. And if there were they probably got erased when they switched phones.
With all the cameras trained on the tradgedy on 911, don't you think if there were celebrations here there would be at least one picture or video documenting it.
I do remember video of celebrating in the middle east, but not here.
That's where people are confusing the two -- (and it certainly wasn't thousands and thousands in that Gaza footage.)
Numerous people can also "remember" something that didn't happen --
"The phenomenon of false memories is common to everybody — the party you’re certain you attended in high school, say, when you were actually home with the flu, but so many people have told you about it over the years that it’s made its way into your own memory cache."
There have been many studies on this phenomenon - just one, for example:
"[T]he investigators spoke with the subjects about the Sept. 11 terrorist attacks and mentioned in passing the footage that had been captured of United Flight 93 crashing in Pennsylvania — footage, of course, that does not exist. In both groups — HSAM subjects and those with normal memories — about 1 in 5 people “remembered” seeing this footage when asked about it later.
“It just seemed like something was falling out of the sky,” said one of the HSAM participants. “I was just, you know, kind of stunned by watching it, you know, go down.”
False Memories: When Your Brain Makes Stuff Up | TIME.com
The question actually is whether saying the truth that Muslims celebrated, is not allowed because it is offensive to certain people?
??
No, it's that what Trump claimed -- didn't happen/
Were there a few who celebrated around the world? Some. We know of the small group of adults and kids in Gaza. Besides that, reaction worldwide was pretty universal in sympathy, even in Islamic countries. There were isolated incidents, what few there were.
It has nothing to do with being offensive, it has to do with keeping the historical record accurate.
And as we've seen, Trump doesn't give a shit about what the documented, historical record shows.
Hell, he even changed Civil War history by placing a plaque and memorial on his golf course in honor of a battle that never took place, only to ingratiate himself.