Healthy debate is good as long as Christian love and grace are practiced by both debaters. If we debate and divide the body of Christ over trivial matters and personal isssues, it is a bad testimony to the world that we do not truly love one another!
I agree that a healthy debate is good as long as Christian love and grace are practiced as you said. And it can be fun and informative. But don't confuse the word debate with argue. An arguement is never good and could cause division and would not be a good testimony at all. Is that what you were saying? If so, I certainly agree with you.