The difference between ethical atheism and nihlism is that ethical atheists have more faith

[Tea Earl Grey Hot]

"Bad person"?! According to what? The bible?

I think you can have a knowledge of ethics that it is wrong to direct your will without any wisdom guiding it. It is similar to the concept of rationality. Epistemology and ethics are closely intertwined.

That's not obvious to me. Just because I think it is good to use wisdom to decide what is "right" or "wrong" doesn't mean that that is therefore "right" to apply wisdom in directing my will. I can't see anything wrong with me acting only on impulse. But that's not something I'd like to do because I value a long and successful life and not using wisdom to decide what to do would not accomplish what I want.

I only use wisdom in trying to achieve my already arbitrary desires and morals. I don't use wisdom to decide what these desires and morals should be however because I can't see how one set of values can be better or worse than another set. In that I go by instinct.

To be a Christian really means that your will is always directed towards wisdom. I believe that there could be alternative ways of understanding God, that could also be directed towards wisdom, or towards human nature and the glory of God represented in nature.

So I think that the sort of nihilistic ethics would be condemned in pretty much every single religion and philosophy ever developed. People are created to direct their wills towards what is good, and it is possible to know what is good. Is the knowledge of what is good less important than knowing the details of esoteric scientific theories, if they can even be understood at all?

That's just part of your worldview. It poses no problem to me until you prove that your religion is true.

Human biology and culture reveals that it is wrong to be foolish and direct the will only the pleasures or arbitrarily.

Really? How so? It seems like your already assuming a set of values to reach that conclusion.

Nihilism is a way of saying that foolishness is acceptable because there is no such thing as wisdom. As hinted at before, this also destroys the foundations of atheist epistemology, at least epistemology understood in a sense in which there are duties to accept the fruits of epistemology.

This is just appeal to consequences fallacy.

Anyone who defends nihilism is defending that it is ok to be a bad person. I think it is safe to call them a bad person.

Again that's just a judgement from the assumption of your own worldview. It doesn't discount nihilism or moral subjectivity in general.

I haven't studied nihilism very much btw. I just don't believe in objective moral values. If that makes me a nihilist so be it.