In his Expository Thoughts on the Gospels (vol 2), J.C. Ryle makes some observations worth reading today.  In an effort of wanting to be seen as charitable and kind we often overlook the errors of false preachers.  In his comments on John 10, Ryle makes clear that Christ had none of that.

Those who think that unsound ministers ought never to be exposed and held up to notice, and men ought never to be warned against them, would do well to study this passage. No class of character throughout our Lord’s ministry seems to call forth such severe denunciation as that of false pastors. The reason is obvious. Other men ruin themselves alone: false pastors ruin their flocks as well as themselves. To flatter all ordained men, and say they never should be called unsound and dangerous guides, is the surest way to injure the Church and offend Christ.

-J. C. Ryle