Some theists point out how atheists don't have an objective basis of morals. Well, I think that is true. Indeed, atheists mostly have subjective morals instead of a single organized checklist of dos and don'ts. The reason is pretty obvious: atheists don't have a single "atheist leader" who dictates what they're supposed to do, basically because Atheism isn't a religion to begin with.
So what if Atheists don't have objective morals? Would that make them any less moral? Depends on what "moral" is. Trying to define what "moral" is already causing problems.
Is killing another human being downright immoral? Some would definitely say yes to that. How about killing as a result of self-defense? How about killing in the name of religion? Sacrifice? Righteous punishment? From just this, controversy already creates wildfire. All is subjective. It is only objective when talking to someone in the same religion but sometimes, it isn't even the case, hence the formation of divisions and sects.
More likely than anything else, the people who established the religions have made the moral guidelines from their own decisions. Faithfuls would argue that the rules were given to their leader by their gods, but I wouldn't delve deeper into that issue.
Where do atheists get their morals? From thinking, just like the founders of religions. Theists would probably be appalled by the idea but it's just the way humans are. Humans have minds and consciousnesses so they can think and be aware of the universe.
What is moral? What is not? You can ask. You can seek answers from yourself. It's all up to you.
