Reply To: Can a Non-Religious Jew be a Tzadik?

There’s no question that if it was done intentionally NOT because God told him so, rather in spite of it, then it’s definitely not a mitzvah.
What you’re saying is that if a Jewish person does something and isn’t aware that it’s a Mitzvah, he receives benefit for it. That is correct. But that’s not the case here.
By all accounts, people who intentionally denying God’s existence, are considered wicked. Wicked people do some good things. It’s not a contradiction.