Yes, strangely enough, it seems even people who speak out against biases are biased.
As much as I would appreciate "consolidated PF," I think its a moot point. For one thing, it's unrealistic for IC behavior to be reflected by more than the exesiting skeleton of what characters believe to be true. There's debate over historical fact to this day that could be attributed to personal belief, and in that respect, it's more realistic to expect everyone's interpretation of other nations to be different.
For another, I'm not ashamed to admit I haven't read every chronicle. There's kind of a lot, and not all of them are terribly interesting. I comb through them at my own pace, but if I can't get interested in the reading material, I'm going to probably skim it or pass it up. Certain pieces just don't have an affect or influence on my character, nor does it involve anything in my current RP circle. So while you might think I'm purposefully ignoring some mind-explodingly awesome mote of Federation history to better my opinion of my character vs. others, I might just not know of it in the first place.
For another, would it really change anyone's point of view if a consolidated "manual" was produced for the various nations? Considering the venom we spit at each other on a daily basis, it would get rationalized / altered / ignored, just as you claim current trends suggest.
So yeah. Biases exist, for various reasons.