If heaven is your ultimate goal in life, we will have to place truth above everything and everyone. Are you willing to do that?
Differences are unpleasant. There is no excuse for them unless they in some way affect our reaching our destination. Christians are commanded to love one another even as Christ also loved us and gave himself for us (Jn 13:34 f; Gal 1:4). Yet, the truth supersedes even our relationship with fellow Christians. I am sure Paul would not have desired to confront Peter face to face. (Gal 2) Peter was a well loved and cherished apostle of Jesus Christ, a pillar among the brethren, as opposed to Paul who had once persecuted the church. If anything, Paul would have desired to be close to Peter, even to the point of never correcting him. Yet, when Paul saw that Peter was showing partiality to the Jews over the Gentiles, Paul confronted him over this issue.
Paul did the same when John Mark left the ministry. Paul and Barnabas had great contention about accepting John Mark back into his ministry (Acts 15:36-41).
Who doesn’t want peace and love from their own family. Yet Christ demanded that we love Him more than father and mother, husband or wife, son and/or daughter, and even ourselves (Mr 10:37). Which of us would side with the truth over our families? If we do not, we cannot even be a Christian! (Lk 14:26).
John sets the limitations of courtesy where truth is involved: “If there come any unto you, and bring not this doctrine, receive him not into your house, neither bid him God speed: For he that bids him God speed is partaker of his evil deeds” (2 Jn. 9-11). This includes friends, family, and errand brethren.
As Christians, we have to take sides. We have to put the truth over worldliness, over denominations, over wayward brethren, and over our own families. If you want to be a faithful Christian, the truth comes first!