(in response to first poste)
Now, you have three types of Christians. Those who are zealots and study their religion (Blondie), those who look at religion with a critical and open eye, and those who claim to be religious but really don't study it.
Type I and II are people who are open to theological discussion. While Type I tends to be over-religious, Type II will study ALL world religions, and science, and compare them. I have a Scoutmaster who is also a preacher, and we have theological discussions: unlike most Christians, he has actually looked at Judaism and Islam and rather than dismissing it all as not real, studies it and compares it to Christianity.
Type III people are idiots, and, alas, probably make up the majority of the Christian population. One example is my peers: I live in the Southeast US, where Christianity is very common. I've had debates, with kids who go to church (I don't), about these ideas:
1. Is Christmas about Santa or Jesus? (the Church Kids were arguing in favor of Santa)
2. Do Jews believe in a god? (they just DON'T UNDERSTAND that "god" and "God" are different things)
3. Are God and Jesus one in the same? (they said yes)
One other example is Adam and Eve. I asked my science teacher a question regarding genetics and primordial soup and, this being the South, she was rather disturbed by the question because she had to tread lightly (not offend creationists and supports of primordial soup). As such, she explained that whether humans originated from a comet and water or two beings crafted by God mutations occurred, giving us our alleles.
Now, here's the main fault with that:
If somebody really reads the Bible, actually pays attention to it, they will notice that Adam and Eve's offspring married off to others, and that Cain wandered around the world, spreading the shame of his brother's murder to the other communities. Anybody who reads the Bible would therefore realize that, just because Adam and Eve are the first humans MENTIONED in the Bible, they are NOT the first.
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So, there are masses of ignorant people out there who claim to be Christians, but none of them are true Christians. A true Christian would understand the Bible, and the best Christians would look outwards as well.