A couple of questions to clarify where you're coming from, so I understand your point of view.
1) Are all weapons systems inherently evil?
2) Are weapons used to defend or deter attackers evil?
3) Are the things used to destroy the library at Columbia considered weapons?
4) are the companies that produced the shoes used to stomp and break tables part of the military industrial complex?
5) are the companies which produced the cloth which was (in this case) used to try to shield the identities of the "protesters" at Columbia part of the military-industrial complex because they produced articles which were used for "stealth"?
6) how far do we stretch the definitions in order to justify waging war on a university in order to protest the waging of war?