Most of these men have gone on record saying that they don't believe that separation from disobedient brothers is a biblical mandate. Some have written off separatism as a dead or dying idea.Whether by accident or providence, I know not, but a short while ago I came across this article by Al Mohler when I wasn't even looking for it (HT: Nate Busenitz). Mohler is the member of this group whom I have found most often to be castigated for his unwillingness to affirm the mandate to separate from disobedient Christians, and yet he writes:
The set of second-order doctrines is distinguished from the first-order set by the fact that believing Christians may disagree on the second-order issues, though this disagreement will create significant boundaries between believers. When Christians organize themselves into congregations and denominational forms, these boundaries become evident . . . Christians across a vast denominational range can stand together on the first-order doctrines and recognize each other as authentic Christians, while understanding that the existence of second-order disagreements prevents the closeness of fellowship we would otherwise enjoy.My perception is that the tendency to deny the separatist convictions of other believers is not that they are not separatists, but that they are not separatists like us.