believe:
2. to have confidence or faith in the truth of (a positive assertion, story, etc.); give credence to.
- dictionary.com
At some point you made a judgment call that the theory of evolution was an adequate explanation of the state of life in the world, that the evidence for this was overwhelming. You were not offered a mathematical proof, but based on all that you know, you "give credence to" and "have confidence in" evolution as a correct explanation.
As for Jim Robinson's actions, I find this somewhat distressing. I have always had the attitude that being on FR is sort of like being in Jim Robinson's living room. Sometimes this has caused me to not say things that he or others might find offensive. But I also felt that one of the strengths of FR has been that it was a great forum for open debate, where people are not censored or banned as long as they discuss things in a civil manner. To me one of the most attactive aspects of conservative thought is the idea that opinions must be backed up with logic and reason. If certain opinions that that are not even in any way political are no longer allowed, I'm sure some of the best people around here have already left.
I understand and agree with your definition, but there seems to be a FR and Biblical literalist limited modification that involves the absence of evidence. That's why I used quotes.
And yes, many of the best have left.