all he had done didn't kill any civilians, the bridge has the real goal to prevent the mutant monster to go deeper in populated areas. (as without the bridge he cannot cross because water was his weakness)
Most of the "terrorism" he had done was to train stardust to bigger treats he knows will come and to deal with other treats while he tries to look like a villain.
Even this fight, he took the mecha from a group that was using against civilians, just to put a show and fight stardust.
@cabellones He is endangering people and causing billions(dollars, in korean won forget it) in damage in his rather self- righteous but effective pursuit, while leaving everyone in the dark about who could have done smth about it... He is a villain, because he selfishly does whatever he wants with little regard for concequences and alternatives. Innocnet people almost died due to his actions, sure he saved them but his games are dangerous and so he is a villain.