The result, many pastors and people fight among themselves for who is the holiest, and then separate from them. Believing exactly the right doctrine was the most important thing. There is no room for tolerance. I was refused graduation because I did not believe exactly the same way they believed on every doctrine. I did learn enough Hebrew and Greek to point out their inconsistencies.
Outward appearance is everything.
In the south it was very different. Doctrine was not as important as your outward appearance and evangelism. Win the lost at any cost. Women were forbidden to wear pants which was considered an abomination. Men and women had to stay 6 inches apart, were not permitted to hold hands, and never, ever kiss.