Bob Jones University had a well-organized network that kept track of various Christian publications, conferences, and churches. They began attacking Christians who were not in obedience to BJU, denouncing them across America and forbidding God's people to have anything to do with them. They took a new and strong stand for "secondary separation," teaching that we were to disobey the Biblical commands to fellowship with Christians who would not obey BJU. Eventually, they expanded this false doctrine to forbid Christians from associating with anyone who associated with anyone who associated, etc., with anyone whom BJU did not approve of.
Drunk with power that neither God nor man had given him, the president of BJU forbad any Christian anywhere to criticize him or his practices, and forbad Christians to fellowship with anyone who did. And with large numbers of fundamentalist churches being pastored by BJU grads, strong, fundamental evangelists who had already been rejected by moderate Christians found themselves unable to get speaking engagements if they did not did not obey him. He drove deep divisions into fundamentalists, isolating them from Godly Christians and groups who realized BJU's errors, as well as isolating them from each other.
Their new magazine, "Faith for the Family," spread this fighting into congregations whose pastors would not obey BJU, and he invented the word "pseudofundamentalist" to describe Christians who obeyed the Biblical commands to love one another.
And then it all backfired.