That's not exactly correct. Sure society has some influence but you also have to look at Cho. He isolated himself. His roommates, people who would ask him to go with them to lunch, even his professors tried to reach out to him! But didn't speak a word to them! He was basically quiet. The English professor, noting that Cho had created multiple disturbing writings, took it on herself to tutor him one on one outside of the class room. To try to goad him to talk. To learn why he wanted to be an English major. To get to know him if only a little bit.
How did they fear him before this tragedy? He was a loner and everyone left him alone. Mainly not because he wasn't popular, but he never interacted!
I find his vindication for commiting this tragedy entirely absurd.
this may be. but i've read an article saying that people did try to interact with him, except they were picky with words, and they were hesitant to talk to him at first. this might have helped trigger his murerous tendencies since he was being patronized.
People usually act hesitant with individuals like Cho, who hardly speak. Not just outside people, but even his
own family! He wouldn't speak a word to his own family since he was a child! Which caused rifts in his family and extended family.
Picky with his words? Neither reports from BBC, CNN, and NYT was there mentioning of them being picky with his words. How could they be when he would never speak up?!
Stop trying to find some ways to alleviate, or make some small excuse, what that ass did! He was mentally unstable, however, the social mores, norms, society as a whole, did not contribute, to the entirety to his idiocy.