True respect between people requires an ability for them to disagree without damaging the relationship. We can have fellowship with people who we do not agree with on every point.
There are many essentials in the Christian faith, but there are many non-essentials where we may have liberty. In relationships with respect we can have fellowship with those whom with we disagree in non-essentials.
Too often we find we or others cannot have respectful dialogue or fellowship with those who disagree with us in non-essentials. Often an over zealousness to defend the Christian faith on non-essential issues is a sign of a weak faith.
A weak faith often cannot distinguish what is important or not important in faith. It cannot grasp that not all truth is worth fighting over. Too often we see minor debates over the small meaning of this or that verse become overblown issues.
There are certain over arching essential principles where there must be unity, but there are a massive number of important but minor key ideas in Christianity where we can respectfully disagree with others whom we have complete fellowship because the issues are minor and of not much consequence.
Christianity is about finding what God finds important. If God finds the poor, justice in the public sphere, missions, heaven and hell important then we must find these things important important (and God does find all of these things important).