It has not made them happy. This is really true in any cult environment. Once the new recruit crosses the line of active participation and group socialization, any conflicting data is easily dismissed. They NEED it to be true. There is the real power behind the conversion of one's world view to that of the cultic mindset.
Life is simpler and more manageable, even if much more is required in the way of effort than before.
Some do, which I think is unfortunate and damaging, because it portrays God as being some sort of politician who is trying to win a person over to his side, and who uses phobia indoctrination and haste as his primary techniques. These are ploys used only by the insecure and powerless, certainly not befitting an all-wise, all knowing Creator who loves His people. If persons are converted in this manner, their view of God is certainly warped and unhealthy, and is not even representative of the ministry of Jesus or of the apostles. These people love to preach the fires of hell, the elaborate and conspiratorial works of Satan, and the impending doom of the world, attempting at every move to put a rain cloud over the heads of people who might ordinarily consider the gospel of Christ as good news which brings joy, healing and deliverance. With cults, the message is purported to be good news, but is really more bad news .