All perfectly valid criticisms of 9/11 conspiracy theories that I wouldn't hesitate to use myself. However, none of them justify the out of hand dismissal any new contradictory evidence.
OK, how about the fact that the authors of the report themselves point out several other mundane reasons as to why it could be there yet all the focuse is on the "OMG Thermite!". Which couldn't even be used to bring down the building in the first place.
It gets a bit tiresome after a while especially when you have people blindly holding on to evidence that has already been quite comprehensively debunked.