From my experience most "nerds" are actually way too quick to criticize others. They lack confidence in their social skills so they form an identity around their supposed technical abilities. Then they use that identity to justify bullying, but instead of beating up someone with a diminutive stature they'll post a tweet about how someone is a moron for not using the correct design pattern on some code they posted on github.
This is not confidence -- this is insecurity and arrogance.
This is not confidence -- this is insecurity and arrogance.