Right, and I don’t think Al Mohler is saying that at all. His life and work are a testimony to that. GOD has obviously given him a heart for cultural engagement, but you can tell his focus is completely on Christ and the (true) Gospel is the center of all he does and preaches.
Mohler is like several of the other signers: Pastors Tim Keller of Redeemer Presbyterian Church and men like Wayne Grudem. These aren’t your Jerry Fallwell/Pat Robertson types if you know what I mean—but men who have done wonders for the spread of the Gospel and have led the Great Commission in very, very difficult places. (Tim Keller pastors one of the most vibrant Gospel-centered communities in the heart of “godless/pagan” New York City!)
I agree that Mohler et al are godly men and do a lot to spread the gospel. But that isn’t the issue. The issue is whether the M.D. states that the most important thing is to spread the gospel. And it doesn’t. That is why, even though godly men have signed it, I won’t.