Why are ISTJs so mean?

Why are ISTJs so mean?

ISTJs value stability, and tend to appreciate relationships that they can count on over the long term. They keep their promises and expect others to do the same. ISTJs are resoundingly logical and can be stubborn once they've decided on the best course of action. They usually like things done their way.

Are ISTJs smart?

ISTJs are known for being hardworking, diligent and dutiful. But what they're less known for is their keen intellectual streak. These types take care to research the topics that interest them incredibly thoroughly.