What exactly do atheists believe in? Do you believe in nothing?
Atheists don't believe in something by faith, like theists do. In fact, atheists don't believe in anything, we just "believe" in facts. And you're gonna say, but not everything has been proven. That is true, but that doesn't mean you can hypothesize with existing theories and laws about something that can be explained with them, although not yet proven. Of course, science is not perfect. But that makes it more interesting.
Do you believe in human souls?
What do you believe happens when you die?
Caput. You just cease existing. Of course, you cease existing as an individual with conscious mind, but your body remains. I think the beauty of death is when you become part of nature again.
Do atheists believe in sin, or do you believe in being able to do anything without consequence?
I don't believe in sins of course, that's a theistic concept. Theists assume atheists don't have morals. Far from that, I treat people with respect, trying not to hurt anyone, and always respecting their rights. Of course, I'm not perfect, and I'm allowed to make mistakes... But I feel like I try to do good, or at least not to do bad, because I really don't want to hurt anyone, not because my religion, my god, my book, whatever, tells me to do so. To me, it is more fulfilling if it comes from me, not because I'm told to do so.
Are you scared to die?
I think I'm too young to fear death. My mother once said something that got stuck in my head: Young people feel like they are immortal. And it's kind of true. Dying of old age is so far away from me, that I can't imagine it. And I can't wrap my head around it, so I just don't care about it yet. But of course I'm scared of death at some point. Life keeps going because we survive, if we died we wouldn't be here to talk about it, we evolved mechanisms to fear certain things. Of course I'm scared of sudden death. Especially knowing this is all I'll get. I don't believe in afterlife so I better spend life as well as I can.
If when you died there was a God and it offered you a chance to believe and go to heaven, would you accept them?
If I died and I met a god, I wouldn't have to believe in it, I would experience it. And I'll probably be condemned anyway XD.
That said, it would probably be some kind of dream or hallucination that my brain created to sugar coat death. But I would try to enjoy it, why not.
What are your thoughts on anti-atheists? What I mean by that is what do you think of Catholics, Jews, Muslims, etc.
I don't care about what religious people believe in, that's their business. If it makes them happy, so be it. What I don't like is bigotry and religion tied to government.
Would you ever believe in God? By that I mean could something happen to change your beliefs?
No. I don't think there would be a single reason to believe in gods. It just doesn't make sense to me. I just don't feel it, and I don't think there's anything that can change that.