1) There were numerous signs that Cho displayed dangerous and alarming behavior that concerned many people in his community, though the mental health system ultimately failed to address these issues.
2) Retroactively diagnosing Cho does not provide a true understanding of why the tragedy occurred and merely labeling his behavior does not equate to an explanation.
3) To fully understand complex human behavior, one needs to consider multiple developmental and environmental factors in a person's history, not just reduce it to a diagnostic label. We must approach these situations with more humility and investigation rather than oversimplification.