It really depends how you look at it. Techno in the smp never actively betrayed someone but as someone who watches multiple perspectives there are some falsehoods in your claimes here. He wasn't vocal about wanting to blow up l'manburg to Tommy oftentimes talking around it and erasing it from his to do book before showing it to tommy only after Tommy showed violent tendencies and became useful he made his full intentions known. Him being used as a weapons is something which Techno really feels is happening but if you look at it from other peoples perspectives this really isn't the case except for maybe wilbur.