What type of evidence would you consider?
What have you got? :)
What reasons do you have for concluding that Christians are probably not freethinkers?
Most Christians follow dogma. Notice words such as "probably" and "most" and "usually" in what I say. There are exceptions.
Meaning you don't follow dogma, but rely instead on your own senses and intelligence.
Exactly. And when I say that a lot of atheists disregard supernatural for being supernatural, I am saying that they rely upon a non-religious dogma rather than actual thought.
I disagree. I think most atheists were raised with religion, and reject it only after a lifetime of personal reflection and deep thought. This is also why I get annoyed when people say that atheists don't know what Christians really believe. The fact is, most atheists were Christian, so we do know what Christians believe. You can base your reasons for belief on what I guess is logic, as Johnny just did in his new thread about evolution, although I think it is faulty logic, or you can base it on faith, but the fact is there is no evidence for the supernatural.