Egoism is Anti-humanistic
Humanism has been a long and constant fight against secular and religious groups. Humanism is an ethical stance that greatly emphasizes the value of human beings. Critical thinking and evidence is the foundations humanist thinking.
People who mostly belong to various religious groups tend to be egoistic. These are people who validate everything based on their personal interest. They are sometimes described as people who have excessive concerns for oneself or exaggeration for their emotions and importance.
Being a humanist means that you can take criticisms and take it into account. You would want to dissect every detail and re-think everything to get a good reason. That means you are open for a professional and civil conversation about anything.
Therefore, these traits are the exact opposite of secular humanism. When you choose to help, you must extend your hand not because you are gaining something.