When people repeat what The Judge (John 12:48) of our souls has said, those people are not judging. They are merely (and mercifully) letting you know you've got a boulder about to fall on your head. In fact, the people willing to be inconvenienced enough to tell you what you need to hear are, by far, the ones who love you most. Thank them for the correction. They are not the One who said such behavior is lethal. Those kindhearted enough to risk being verbally attacked for trying to lend a hand are essentially saying "I’m only telling you what the Judge has already said. The behavior has already been judged, and the sentence has been given; I care about you so I am trying to spare you the punishment.” I'm not judging or maligning you I am only telling you what the judge has said on the topic so that Satan cannot malign (Revelation 12:10) your life. 

Before a doctor can administer a cure for your deadly disease, both the doctor and you, as the patient, must acknowledge the sickness. When the prescription saves your life, you owe your doctor profound gratitude. How much more the person attempting to snatch you from eternal fire so that  instead you can experience eternal pleasure in the glorious presence of your Heavenly Father. 

Let’s just admit what’s going on here: Satan wants a world where it is a social faux pas to call a spade a spade. If it is wrong to say someone is doing something wrong, fewer people’s sins get "diagnosed" and fewer people’s sins are "cured" by repentance.  Don't fall for it.