barium nitrate

So, Grandpapa Jones seems to lack a massive feature of what makes up Thermate, Barium Nitrate. Given this rather glaring ommision, I find it somewhat perplexing how he can even claim it to be thermate remains. The only possible refution is this bloke on this website...

Stephen Jones claims that since he found sulphidation in the metals from the WTC wreckage, he's found proof of thermate. I know I don't need to explain to anyone what's wrong with that, but I have a question that maybe someone with knowledge of chemistry can help me with. There is much more...