Wouldn't have mattered much. KKK got pushed back because well for one they were labeled as an terrorist group by the government, the language of America changed, and the government gave African Americans their past dues in equal rights, thus made it hard for KKK members in businesses to really do anything overt which was the only thing KKK knew how to do.
If church accepted the KKK as their role model that would only destroy churches. It's kind of disingenuous to suggest that it was the church and Christians who pushed KKK back when really most of America were either indifferent to the plights of African Americans, or angry about their continual demands for equality. Especially when Christian heavy states dragged their feet on abolishing some of their more racist laws even after the federal government pushed era defining acts.