You know if god really didnt want people destroyed - how about giving people a book that could not be interpreted 1000 ways by 1000 people, or one that actually makes prophecy easy to understand and recognize, or why not state something in there that would be indisputably be from someone who created the universe (the circle of the earth is the best you can do?)
Or better yet - how about a Booming voice from the sky in every language saying - hey little ones - i'm god - please do this that and the other thing.