"The group, which includes families of those killed, asserts that the investigation is flawed and that the conclusions as to what happened must be based on 'science and engineering' and accept that controlled demolition is a plausible cause."

We might be wrong about where we suspect this all leads, but the "debunkers" are wrong when many essentially argue that it's acceptable for 70% of 9/11 family members questions to have never been answered by the 9/11 Commission. So of course, most have no qualms about promises made to 9/11 family members being broken by the Commission to investigate all whistleblower claims, which a substantial amount of the public find highly-suspicious at minimum, with many regarding the evidence as suggestive of complicity to varied degrees.

The below link proves that many thousands of family members want a new investigation. Likely the amount of people killed that day is outnumbered by these 9/11 victim's family members.

 http://911debunkers.blogspot.com/2014/03/thousands-of-victims-family-members.html