True, God certainly did not make the world wicked as it is, but since the fall he made a plan to separate out the clean from the unclean (Matthew 25:31-46), which I firmly believe is the reason we're all here instead of being in heaven (until the separation process is finished). The reason he is keeping so many secrets from us (speaking in parables, etc.) is so that only his chosen ones (those who not only are called, but actually answer the call) will receive the words in spirit - the Truth. "...the words are closed up and sealed until the time of the end. Many will be purifed, made spotless and refined, but the wicked will continue to be wicked. None of the wicked will understand, but those who are wise will understand." - Daniel 12:9,10.

"The knowledge of the secrets of the kingdom of heaven has been given to you, but not to them. Whoever has will be given more, and he will have an abundance. Whoever does not have, even what he has will be taken from him. This is why I speak to them in parables: "Though seeing, they do not see; though hearing, they do not hear or understand. In them is fulfilled the prophecy of Isaiah: 'You will be ever hearing but never understanding; you will be ever seeing but never perceiving. For this people's heart has become calloused; they hardly hear with their ears, and they have closed their eyes. Otherwise they might see with their eyes, hear with their ears, understand with their hearts and turn, and I would heal them.' - Matthew 13:11-15

"I praise you, Father, Lord of heaven and earth, because you have hidden these things from the wise and learned, and revealed them to little children. " -Luke 10:21