One thing that frustrates me about the Bigfoot community (or I should say a small faction of it) is the folks who make the unwarranted leap from believing in the existence of the animal to professing to know all about it, what it really is, how it behaves, etc.
I'm not trying to rile anyone or point fingers, but honestly, you have people writing books and doing publicity saying that they know this creature is mostly human, likes to give gifts, has special powers, etc, etc, and it all seems more than a bit presumptuous to me.
I want to say, "well, you may THINK this is true and you are perfectly welcome to say that, but you cannot KNOW it is true because there is precious little at all known about this creature at this point." There is not even a single specimen in capivity or on a forensic lab to glean any real evidence from; all else is total speculation. And that is fine, but just SAY it is speculation, not fact.
Again, I strongly believe this creature exists. Thousands of witnesses are not ALL misidentifying, hoaxing or lying. They just...aren't. But beyond that, I have no clue what is going on, for certain. And really, neither does anyone else. We're all just guessing; educated guesses, to be sure in some cases, but guesses nonetheless.
I think it's important to be able to dwell in the uncertainty before you leap to conclusions. That way your mind is kept open and isn't stuck defending positions you were 'sure' about, when and if the real truth comes out.