"Why do you see the speck that is in your brother's eye, but do not notice the log that is in your own eye? Or how can you say to your brother 'let me take the speck out of your eye,' when there is the log in your own eye? You hypocrite, first take the log out of your own eye, and then you will see clearly to take the speck out of your brother's eye." (ESV Matt 7:3-5)Christians habitually entering the Sunday morning worship service with long solemn faces consider this expression (attitude) to reflect the seriousness of the service and the majesty of God; other members waltz in sporting happy faces, reflecting what they feel exemplifies God's love, and they smile because they appreciate all the blessings He has lavished upon them. Both on occasions comment that the other bunch doesn't see the "worship service" in the right perspective. Both see logs in their brother's eye.
The Lord's table is an example of trying to find the appropriate face (attitude) to partake of the emblems in the proper manner. While the emblems represent His death and burial, they also represent His resurrection from the dead. One person is thinking of what He had to go through for us and is sad, another is pondering His resurrection to life and a future eternal life with Him, and they are smiling and happy.
It seems to me that all we can do is accept differing attitudes (smiley faces & solemn faces) with unfeigned love for them in our hearts, and realize that we sometimes just see things differently, neither group may have the wrong attitude, just a different perspective.
We are all different. Sometimes we carry a speck in our eye, and at other times a log. It certainly doesn't behoove me to resent another Christian because they don't see things the way I do! We may be members of His body, but we differ drastically at times, and none of us, on every occasion, will meet the expectations of our brothers and sisters perfectly.
One church may continually find fault with other churches because they don't fit into their rigid expectation of what constitutes a perfect church, this is an example of a church with a long solemn face. The happy-face churches don't appreciate the insinuations that they are not truly Christians, but only pretenders; so they denounce the "perfect church" as delusional, and on-and-on it goes!
All Christians should have as their goal a unified local church, willing to accept each other in spite of their differing hermeneutic and varied opinions. It should also be the goal of the "my-way-or-the-highway" churches to acknowledge they have brothers and sisters in "churches" other than their own tribe, and together they constitute the living body of Christ.