Are you implying that the only relevant part that they should have put all effort on was the fall of the façade and forget about everything else?
Not at all. Only an idiot would suggest such implication.
Please explain in that case how it's not implied by your answer to my question:
What was the initial relevance?
The relevance is that half of objective #1 was to determine
how the building
descended. [...]
Invaluable information... [...]
which I asked you to reevaluate after I noted that the collapse the NIST studied started way before the descent of the façade. They studied carefully the
start of the collapse and what was going on under the hood.
Smearing attacks ?

Don't be a drama queen. Criticism of NIST technical failings not something you are comfortable with ? Oh well.
I have not objected to some of your criticisms, where they don't conflict with keeping in mind the scarce relevance of the fall of the façade in the collapse for their purposes.
But you often go further than that and make statements that go beyond a simple statement of the problems with NIST's methods.
Compare, say:
"NIST's data has problems A, B and C".
with:
"NIST's data is shoddy and useless because it has problems A, B and C"
[1]
not to mention:
"NIST is sloppy and their data is shoddy because it has problems A, B and C"
And in doing so, you make certain mistakes that are attributable to an excessive wish to smear them, and that I keep pointing out.
Quote please, or retract. Note I'll have to laugh if you post your own misleading misinterpretation, so make sure you have actually read the words.
A very recent example, related to descent vs. collapse:
By the wording stated, absolutely, and therefore pre-decisional. Not a good start to a scientific study which includes analysis to determine whether there was any nefarious activity. Tsk, tsk
Another one, the one that triggered this last interchange:
The NIST data suffers from the following (non-exhaustive) series of technical issues, each of which reduce the quality, validity and relevance of the data in various measures...
(I highlighted the misleading word in a previous post, I didn't want to highlight it here to allow it to be better understood in its context).
Fine by me

(Criticism of theirs will of course be a part of that discussion)
That's fine by me as well, but see above for what is criticism of
theirs [their data] vs. criticism of
them.
[1] Such a statement would be fine in certain contexts, like expressing frustration for the applicability of such data to one's purpose. That's not the case here.