You are inferring alot from an original transcript that positively identifies noone.

I do not think it even alludes to a perpatrator at all. In fact it does not. It just provides insight into certain factors that may have also gone into the destruction of the World Trade Centers.

Either add some insight/criticism or debate the factors. Do not just add a sentence which does nothing but negatively demote those who are questioning.

Questioning historical events can often add further factors which may enlighten people as to why the occured or how they occured.

No one is pointing fingers and even if they did it still does not leave you room to belittle them.