We must be careful not to blur the lines between not compromising our positions and having sacrifice without mercy.
James 1:27 "Religion that is pure and undefiled before God, the Father, is this: to visit orphans and widows in their affliction, and to keep oneself unstained from the world."
Our religion (speaking as James would define it, rather than some program or whatever) is not based upon how well we hold to a belief, but rather how we love people. The last description is often a can of worms in this department, as many tend to throw in their ten cents concerning what being "unstained" looks like. Well, here's my tens cents. Take it for what it's worth (pun intended).
I would define "unstained" within its context. I would treat this as a neat segway to chapter 2, where James further describes how we should treat others, just like 1:27 was describing. I believe the context supports the notion that being unstained from the world refers to not live according natural tendencies to treat people differently based on status.
Anyway, all that to say, "unstained" is not quite so broad and subject to opinion as one might think.
Back to the point. Our religion is not based on how dogmatic we are about our doctrinal stances. Rather it is based on how we relate to those around us. It is founded in a relationship with Christ, and that reveals itself through our relationships with other people. When we choose to break relationships because of our inability to compromise, we defile our religion. We sacrifice, but neglect mercy. Now, there is cause for separation, but even that is to the end that heavenly and earthly relationships are restored. When a brother or sister in Christ chooses sin and/or to follow a false Gospel, then there is a reason to separate, all to the end that the wanderer might return to Christ and to the fellowship of believers.
When we become so "sold" on beliefs concerning issues that do not necessitate such a "sold" point of view in order to progress in our relationships with Christ and others, we set ourselves up for nullifying Phil. 1:27 and Eph. 4:12-13 with our lives and relationships. I will not give specific examples so as not to stir up disunity, however this is something that we ought to meditate on. Is my dogmatic stand concerning ___ more important than my relationship with someone? Is my or someone else's relationship with Christ really at stake if I or they do not believe ___? If not, then we should be willing to compromise.