Peter Ruckman had no problem ripping into his alma mater. Some of his accusations were true, some were false, none were Christ-like, and all of them were irrelevant. But independent Baptists were surprised to learn that you could attack BJU, criticize its wrongs, and reject its authority, even though they had been taught that this was impossible.
Having been driven into steadily-smaller, hostile camps that spied on and criticized each other, independent Baptists had no one to champion BJU, and its leadership over the group virtually disappeared.
Whether disciples of Peter Ruckman, members of the Southern Baptist Convention, practicing Biblical Christianity without the word "Baptist" in their name, or even continuing as they always had been, independent Baptists rarely send their students to BJU today.
The third reason why God allowed Ruckmanism to gain such influence over independent Baptists was to break Bob Jones University's control over them.