"Well, if I don't believe in atheists, I can't really say if they can be genuine conservatives or not. And I really don't believe there is such thing as an atheist. I believe humans are all born with a spiritual component that causes us to seek God. Of course we can deny that we believe in God or some higher power, but I believe every human has a spiritual nature."
OK. It's all right not to believe in atheists. You're mistaken, but that's your right. I am an atheist. I exist, and I disbelieve in all supernatural entities. You may be mistaking the human ability to think about things beyond their experience for a "spiritual nature." I can easily think about things beyone my experience, since my experience, like that of all humans, is limited.
It's just that, instead of supernatural entities, I see the universe and all that it contains to be a natural phenomenon. That does not prevent my mind from exploring that universe...even those parts of it I cannot experience directly.
Deities aren't part of that, except as an interesting human belief. That I can think about, since human thinking is a matter of considerable interest to me.
There are, indeed, atheists. Their existence does not depend in any way on your belief in their existence. Your belief in my atheism is a matter of unconcern.
I didn't ask that avowed atheists care what I believe but I think deep down inside everyone knows there is a spiritual component to human beings. Whether or not they admit it is up to them.