Biblically we are called to evaluate people’s behavior, to see if the behavior fits their confession of faith. 1 John is all about this; Matthew 7, judge them by their fruits; Ephesians 2:10, good works; James 2:14-26….
Judging truth and judging behavior is important and significant, and don’t let anyone tell you otherwise. We’re so afraid of intolerance and judgmentalism that we don’t exercise biblical mandates to evaluate, to warn, to rebuke, to correct, and so on.
— Douglas Groothuis, from the “Developing an Apologetic Mind” Part 1 lecture at 37:11