Think about it...when right doctrine no longer matters to us, then the true God no longer matters to us.
As frail humans we see things “imperfectly” (1 Cor. 13:12 NLT), so Christians differ sometimes on the finer points of biblical doctrine. However, showing disinterest in and dislike for doctrine says we don’t think God and His Word are that important! I’d rather a person lovingly disagree with me on a point of doctrine than to say our differences don’t matter. Truth matters and it matters that we seek the truth!