Absolutely! I try to impart the gospel to my kids and steer them away from weirdness, false doctrines, heresies, paganism, atheism, agnosticism, and similar grave errors and dangers. I don't routinely enter into a really close non-work friendship with someone I believe is in serious error, even if they seem "nice" (though I don't snub them either, because you never know when your own words and actions can be a useful witness for others, nudging them down the right path).
I just mean, let Jesus look into their minds and hearts. He knows every thought, every input, every experience, all the genetic endowments, all the issues that everyone has. I'm not going to go around pointing a finger and screaming, "I have all the answers and you don't, you heathen! You and all your kind are crazy losers!" Because frankly I don't want to wind up with the goats, the ones to whom Jesus says, "Really? Really? You thought you were such a great Christian? A little arrogant, weren't you?"
Ok, I can understand that position, and I don’t think there’s anything wrong with it. I just wanted to make the point that not judging individual’s state of salvation doesn’t mean we don’t have a responsibility to warn others if we know an entire church is teaching blatantly false doctrines.
After all, if we feel like we would have to warn our own children, then we should similarly feel bound to warn everyone else as well, especially those who profess to be Christian, for they are our true family.
Matthew 15:16
"Are you still so dull?" Jesus asked them.
Matthew 231. Then Jesus said to the crowds and to his disciples:
2. "The teachers of the law and the Pharisees sit in Moses' seat.
3. So you must obey them and do everything they tell you. But do not do what they do, for they do not practice what they preach.
4. They tie up heavy loads and put them on men's shoulders, but they themselves are not willing to lift a finger to move them.
5. "Everything they do is done for men to see: They make their phylacteries wide and the tassels on their garments long;
6. they love the place of honor at banquets and the most important seats in the synagogues;
7. they love to be greeted in the marketplaces and to have men call them `Rabbi.'
8. "But you are not to be called `Rabbi,' for you have only one Master and you are all brothers.
9. And do not call anyone on earth `father,' for you have one Father, and he is in heaven.
10. Nor are you to be called `teacher,' for you have one Teacher, the Christ.
11. The greatest among you will be your servant.
12. For whoever exalts himself will be humbled, and whoever humbles himself will be exalted.
13. "Woe to you, teachers of the law and Pharisees, you hypocrites! You shut the kingdom of heaven in men's faces. You yourselves do not enter, nor will you let those enter who are trying to.
14. Woe unto you, scribes and Pharisees, hypocrites! for ye devour widows' houses, and for a pretence make long prayer: therefore ye shall receive the greater damnation.
15. "Woe to you, teachers of the law and Pharisees, you hypocrites! You travel over land and sea to win a single convert, and when he becomes one, you make him twice as much a son of hell as you are.
16. "Woe to you, blind guides! You say, `If anyone swears by the temple, it means nothing; but if anyone swears by the gold of the temple, he is bound by his oath.'
17. You blind fools! Which is greater: the gold, or the temple that makes the gold sacred?
18. You also say, `If anyone swears by the altar, it means nothing; but if anyone swears by the gift on it, he is bound by his oath.'
19. You blind men! Which is greater: the gift, or the altar that makes the gift sacred?
20. Therefore, he who swears by the altar swears by it and by everything on it.
21. And he who swears by the temple swears by it and by the one who dwells in it.
22. And he who swears by heaven swears by God's throne and by the one who sits on it.
23. "Woe to you, teachers of the law and Pharisees, you hypocrites! You give a tenth of your spices--mint, dill and cummin. But you have neglected the more important matters of the law--justice, mercy and faithfulness. You should have practiced the latter, without neglecting the former.
24. You blind guides! You strain out a gnat but swallow a camel.
25. "Woe to you, teachers of the law and Pharisees, you hypocrites! You clean the outside of the cup and dish, but inside they are full of greed and self-indulgence.
26. Blind Pharisee! First clean the inside of the cup and dish, and then the outside also will be clean.
27. "Woe to you, teachers of the law and Pharisees, you hypocrites! You are like whitewashed tombs, which look beautiful on the outside but on the inside are full of dead men's bones and everything unclean.
28. In the same way, on the outside you appear to people as righteous but on the inside you are full of hypocrisy and wickedness.
29. "Woe to you, teachers of the law and Pharisees, you hypocrites! You build tombs for the prophets and decorate the graves of the righteous.
30. And you say, `If we had lived in the days of our forefathers, we would not have taken part with them in shedding the blood of the prophets.'
31. So you testify against yourselves that you are the descendants of those who murdered the prophets.
32. Fill up, then, the measure of the sin of your forefathers!
33. "You snakes! You brood of vipers! How will you escape being condemned to hell?
34. Therefore I am sending you prophets and wise men and teachers. Some of them you will kill and crucify; others you will flog in your synagogues and pursue from town to town.
35. And so upon you will come all the righteous blood that has been shed on earth, from the blood of righteous Abel to the blood of Zechariah son of Berekiah, whom you murdered between the temple and the altar.
36. I tell you the truth, all this will come upon this generation.
37. "O Jerusalem, Jerusalem, you who kill the prophets and stone those sent to you, how often I have longed to gather your children together, as a hen gathers her chicks under her wings, but you were not willing.
38. Look, your house is left to you desolate.
39. For I tell you, you will not see me again until you say, `Blessed is he who comes in the name of the Lord.' "
Mark 7:26-27
26. The woman was a Greek, born in Syrian Phoenicia. She begged Jesus to drive the demon out of her daughter.
27. "First let the children eat all they want," he told her, "for it is not right to take the children's bread and toss it to their dogs."