However, the first one you posted sounded like there may have been another entity sending ammo to his dorm address.
Ya, you'd have to put in order what I found.
Next odd one, guess he bounced around some, or just blabbing:
Meeting Minutes for 10-13-02 (Meeting #8)
"Pl. Hinrichs
-I find that TAMU have the same pranks as MIT."
http://web.archive.org/web/20041017120025/www.outriangle.org/minutes/02f-08.temp.html
Some of his stuff does seem weird, but remember 2 things:
first, these are engineers. they have a different sense of humor than everyone else.
Second, much of this is probably inside humor shared amongst friends. Inside humor always looks weird to outsiders.
Still a good idea to keep looking. There doesn't seem to be any evidence so far of jihadism, but the rules of jihad require that one blend in. He's blending in with the engineers quite nicely.