Where there is understanding and mutual respect, even minimal communication will be effective. A cycle is at work. You can say something that will create rapport, and the rapport gained will in turn make it more likely that what you say will be understood. You will not escape conflict as a volunteer. It is inevitable.
Conflict is healthy.
It is better than bland agreement on everything. There should be clashes of ideas about tasks and projects, and disagreements should not be suppressed. They should come out in the open, because that is the only way in which you can ensure that the issue are explored and conflicts resolved. But conflicts become counter productive when they are based on personality clashes, or when it is treated as an unseemly mess to be hurriedly cleared away, rather than a problem to be worked through. In many cases, there are several sub-groups working together for a common purpose.