Your question is very broad and leaves much to be desired. If it's on ethics, then they are human constructed. Religion and political systems are all the same in their tendency to create a notion of idolatry; it's a never-ending cycle. Humanity will always create something for group mechanics; let it be religion or a political system. In fact, religion has a lot of socio-political factors for its implication as well. It's not that different from your average democratic system that talks about full freedom and rights, yet enforces rules for the functioning society.
Rules are always up for debate and subject to alteration. What was acceptable in yesteryears, isn't now ... and what is now, won't be in the future. It's a slow process of change. Everything is subject to change. People simply keep adapting to new in-group mechanics and rules to function smoothly. What functions smoothly for some, won't for others. It's just a dichotomous factor of difference of interests.
For few, God is their answer as they ponder over 'what ifs' after death - the greatest paradoxical mystery in life. For others, God is a myth as it's perpetuated by man. The lack of empirical evidence creates divergence from the norm of the current system ... and that ensues in mayhem.
Personally speaking, I am not against or for religion. I am, in fact, against almost all ideological systems that create an in-group and out-group divide, as they are merely there to create conflict and propagate fanaticism and absolute obedience. This idea of 'absolutes versus obsolete' is why God is even there. An Omniscient and Omnipresent being foresaw all well before he even created anything, as he knows all that there is to know ... which should render hell, a fancy tale of 'correct ones ways', a stuff of tongue-in-cheek, black humor.
Yet, it exists, just like jail cells are a watered down versions of hell on earth. I will laugh at any man who would think that instances of divine punishment and absolute rule and limited freedom in religion were not an endless source of inspiration throughout the ages, and ages to come. People, keep believing that 'freedom' is an actuality; it’s just a hopeless human endeavor.
Anyhow, this is (more or less) my stance on this topic.