The sulfidation was explained by the Worcester Polytechnic group (Barnettt, Biederman, Sisson, et. al.) in multiple papers and a couple of different presentations. The sulfidation negates the thermate theory because the temperatures thermate (not thermIte, BTW, not if you're invoking sulfur) achieves would destroy the very sulfidation evidence that the WPI group found. Do a forum search for "eutectic" and read those threads.
Furthermore, the sulfur's source is eminently explained by multiple sources already known to exist within the towers: CRT monitors (remember, this was 2001), various items with organic components, such as paper, rubber, etc. Thermate would actually be a nonsensical proposition, given that it would have to be brought into the towers, and also given that it's use is contradicted by the presence of those very eutectic structures that, I repeat, would've been destroyed by thermate use.
Again: You seriously need to do forum searches for your talking points. You're bringing up things we've refuted years ago.