Among the Saints the Lord wants there to be no contention as seen in 3 Nephi 11. He wants us to look past one another's petty faults.
However, between the saints and the world, Christ said he came to create division.
Luke 12: 51 Suppose ye that I am come to give peace on earth? I tell you, Nay; but rather division:
52 For from henceforth there shall be five in one house divided, three against two, and two against three.
53 The father shall be divided against the son, and the son against the father; the mother against the daughter, and the daughter against the mother; the mother in law against her daughter in law, and the daughter in law against her mother in law.
Teaching the truth creates division. That does not mean we should not teach the truth.