It's important to clarify that atheism itself does not inherently grant anyone the right to enforce their moral opinions on others. Atheism is simply the lack of belief in a god or gods, and it does not prescribe any particular moral code or system.
In any society, regardless of the religious or philosophical beliefs of its members, there are certain shared values and norms that help maintain a functional and harmonious community. These values are often derived from a combination of factors, such as cultural heritage, historical development, legal frameworks, and collective social agreements.
The idea of objective morality is a complex and debated topic among philosophers and ethicists. Some argue that moral principles can be objective, derived from rational considerations or universal principles, while others contend that morality is subjective, rooted in individual or cultural perspectives.
Even if someone is an atheist and believes in subjective morality, it doesn't mean they are free to treat people however they want without consequences. In a society governed by laws and social norms, individuals are held accountable for their actions if they violate these established rules and harm others. These laws and norms are generally created to protect the well-being and rights of individuals and ensure a fair and just society.
While atheists may not adhere to religiously-based moral codes, many atheists adopt ethical systems based on humanism, consequentialism, empathy, or other philosophies that prioritize the well-being and rights of individuals. These ethical systems often align with broader societal values that promote cooperation, empathy, and respect for others.
In summary, being an atheist does not automatically grant someone the right to enforce their moral opinions on others, nor does it mean they can treat people however they want without regard for societal norms and laws. In a functional society, regardless of religious beliefs, individuals are expected to abide by established ethical and legal standards to maintain a cohesive and just community.