Same reason he barely mentions Israel or Jews.
Just about all logical and rational discussion shuts down at that point.
People have very deep rooted belief systems about what is true and what is not. You could build an exact replica of the WTC complex and recreate the events of 9/11 and that in and of itself would prompt conspiracies about whether or not the results could be believed.
The disinformation campaigns regarding 9/11 and Israel have been entirely successful. It is almost impossible for people to arrive at any kind of agreement on what the truth is. The only possible way to do this would actually be to construct fake evidence of a demolition conspiracy and plant it.
The reaction that sentence will prompt is proof enough of the success of a disinformation campaign. The only side that will potentially budge is the average person toward diabolical conspiracy.
The problem is that there was a conspiracy on that day - just the nature of it has been so muddled and seeded with black pills that people are effectively reduced to shills when discussing it.
The other fact is that it is largely irrelevant outside of a few factors. The debate often revolves around why the towers fell or if they should have. It often misses the subject of just how much the CIA knew about the hijackers and who would have been involved in planning/facilitating the attacks.
So… There is a relevant portion - but people have gotten distracted on the irrelevant issues.
Same with Israel. The relevant question is why any sane person would choose to create a place for Jews within the midst of Arabs and Persians. Even if you argue "it's because they were abused by nazis" - putting them between their historical enemies ain't exactly much better than popping them in an oven or a gas chamber.
The existence of Israel only makes sense as a geopolitical powder keg just waiting to explode.
Whether or not Israel is "good" or "bad" is irrelevant to the fact that they are very blatantly being used to leverage geopolitics.