I came across this site in my quest to utterly disprove Islam, and thought that it would be so good place to discuss things.
Anyway, I am an ex-christian who was so Jew by birth, and I was later convinced that Jesus is not the Messiah by a Rabbinic Jew on the internet. Eventually I came to Karaite Judaism and through my reason have concluded that it is the true form of Judaism, which is the only true religion.

Now let me discuss a few of our beliefs (both as Jews and as Karaites)
1. We don't do this "faith" thing, nowhere in the entire Tanakh are we told to believe something without proof, rather the opposite, Proverbs 14:15:
"The simple believe anything, but the prudent give thought to their steps."

2. We do not believe that Atheists go to hell for being atheists, though back in the olden days we would question your intelligence or eye sight since G-d had revealed himself to an entire nation. We aren't very clear on "hell" since the Tanakh doesn't say very much about it, except that it is called Sheol, and it's apparently some kind of dark pit. Anyway, the wicked get punished, but nowhere do we find atheism as a crime, though this would be hard to prove since we'd have to just take your word for it.

3. We believe that Christians are idol worshiping pagans since their Jesus is based on the Roman Sun God Sol, probably done by the Catholic Church. But the point is Jesus cannot be G-d since G-d is not a man, and there for Christians are worshiping a physical entity as G-d, which is idol worship. They also believe in 3 gods so they're polytheists too.