According to the Declaration, when do people have a right to revolution? Why do they have this right?

They have the right to revolt when government doesn't protect or honor their natural right. Why? Because our natural rights were given to us by our Creator and cannot be taken away by government. John Locke states a lot about this topic.

judaism, christianity and islam, are all abrahamic religions and therefore have in common the hebrew idea of a single god which is the source of all morality. the idea of the covenant is only related to judaism, while dharma is a concept of indian religions and the four noble truths are basic principles of buddhism.