We are required to constantly make judgments -- about others, about what they teach, about what they promote, about what they falsify. That does not mean that we sit in judgment and draw conclusions about how God will deal with them when they are out of line.
That also does not mean that we think of ourselves more highly than others. Rather, we assess all things, and accept only those things (and people) who pass the Scriptural tests. We do that right here, and on any other forum.
The example of Paul judging Peter as being inconsistent with Gospel truth is a good example (Gal 2:11). He openly and publicly rebuked Peter for being double-minded. That did not destroy their love for each other.