Let Buddha’s silence mean whatever, it has nothing to do with my subject. I was just contrasting two groups.
Let's do that. Moving on, why do you think Sophocles rejected the gods? Same question with Diogenes, there is ample evidence they did not.
A person who does not believe in God has no obligation to care for anyone whereas a person who believes in God feels obliged to care for others.
Why?
In this context one can ask: How can atheists care for others whereas religionists go in opposite direction?
Many religious people are quite caring and giving and many atheists are not. Religion nor a lack of it makes people neither good nor bad.