I still remember one of my theology professors taking our class to a room with a piano in it. He sat down at the piano and presented a “Middle C concert” to us. He just kept hitting Middle C over and over.

His point was that that’s a bad way to do theology because truth is truth proportionally.

And that’s a danger for one-issue organizations—whether they are advocating a particular view of worship, creation, gender roles, revival, or whatever—because they tend to overemphasize the importance of their one issue:

[I]t often seems to be the case that organizations with such narrow focus and which have been formed for the conscious purpose of advocating that position in opposition to a position viewed as biblically flawed . . . tend to over-speak their case.

—Rodney J. Decker, “The English Standard Version: A Review Article,” Journal of Ministry and Theology 8, no. 2 (2004): 11n17.

I’m not opposed to one-issue organizations in principle; I happily support some and thank God for them. I’m merely pointing out a common weakness.