Jesus summarized the law of the Spirit, and it was to love God and neighbor. Would you also criticize the mentally handicapped or otherwise stricken individuals who for some reason fail to understand some technical component of the Scriptures, but have the sweetest heart? Can you not see that those who follow Christ follow him in the Spirit according to grace and not according to their academic understanding of Scriptures? You seem to place more importance on knowledge than on Truth, because Truth is not to be found in knowledge alone, but in how we treat each other. And if you will judge your fellow Christian so as to condemn them as a liar, that they do not truly believe, or that their disagreement with you is by way of necessity a purposeful distortion of the Truth, then it would seem to me that you do not have kind regard for your neighbor, and the Scriptures contain many an example of how Jesus feels about that.
Jesus knows how it feels to tell people the Truth only to have them reject it to.
Mt 23:13 But woe unto you, scribes and Pharisees, hypocrites! for ye shut up the kingdom of heaven against men: for ye neither go in yourselves, neither suffer ye them that are entering to go in.
(doctrine of nobody goes to heaven)
Mt 23:27 Woe unto you, scribes and Pharisees, hypocrites! for ye are like unto whited sepulchres, which indeed appear beautiful outward, but are within full of dead men's bones, and of all uncleanness.
(Rejecting the teaching, or to be taught, of Jesus and the HG)
Mt 23:33 Ye serpents, ye generation of vipers, how can ye escape the damnation of hell?
34 Wherefore, behold, I send unto you prophets, and wise men, and scribes: and some of them ye shall kill and crucify; and some of them shall ye scourge in your synagogues, and persecute them from city to city:
Joh 8:47 He that is of God heareth God's words: ye therefore hear them not, because ye are not of God.
We're dealing with the same kind of people Jesus dealt with, Religious to the core, but no Righteousness or Spirit of God about them.
Don't expect any more luck with them than Jesus had with Israel.