I have to live with a certain degree of uncertainty, morally and doctrinally, because God has not yet revealed the complete objective facts. But the situation is not so dire. He has already revealed a lot of facts. As far as morality is concerned, the common denominator in all religions is massive leading, for example, to the UN Universal Declaration of Human Rights. The ability of human beings, including atheists, to agree to a moral code shows that they possess a common conscience that cannot entirely be attributed to atheistic evolution.
However, I cannot deny the existence of significant doctrinal and moral differences and even wars, persecutions, and genocides because some people insert supremacy doctrines in their worldview.
There are moral acts that are objective. If you and I see a child who is about to fall into a well, we'll save them. Some sick people may not and may push them into the well, but we are able to describe these people as "sick" precisely because we have a moral compass. There are objective answers to all moral problems and we approach these answers through logic, tradition, and scripture. We may not be able to determine the correct answer in every situation. But, I think, so long we struggle with God to give us the answer, we continue to be on the right side of the God-directed evolution.