Some people today would say that as long as you just get the overall gist of the Bible that believing this or that doctrine really isn t that important. We should note how Jesus and the apostles interpreted Scripture. Jesus expected the Jews to understand and believe the doctrines or teachings found in the Scriptures. May I suggest to you that the majority of false doctrines today, are guilty of the same thing. We can t understand the Bible alike.
Doctrinal unity is impossible.
The earth could not have been created in six days. Simply preaching the gospel will not convert people, we need something else, and so on, their problem is a lack of faith in God.