Yes, atheists, like people of any belief system or worldview, can feel ashamed of their actions. Feeling shame is a universal human emotion that arises when a person believes they have violated their own moral or ethical standards or the values of the community they belong to. It's not tied to a specific religious or non-religious belief.
Atheists, who do not hold a belief in a higher power or gods, derive their moral and ethical principles from various sources, such as secular humanism, empathy, reason, societal norms, and personal experiences. When an atheist acts in a way that contradicts their own values or negatively impacts others, they can experience feelings of shame or guilt.
It's essential to recognize that moral values are not exclusive to religious belief systems. People of different worldviews can have a strong sense of morality and strive to lead ethical lives. The experience of shame can serve as an internal compass, guiding individuals to reflect on their actions and make positive changes in their behavior.
Ultimately, how individuals respond to feelings of shame and what actions they take to address their behavior can vary greatly from person to person, regardless of their religious or non-religious beliefs. Some may seek forgiveness, apologize, and make amends, while others may learn from their mistakes and work towards personal growth and self-improvement.