Maybe so, but I'm partial to intrinsically intelligent people. I wouldn't exactly refer to myself as a Matt Bonner apologist, but I don't think he's being judged as fairly as he could.
His so-called "well-earned reputation as a playoff choker" should be looked at in the proper context, because the reality is, the stagnation that has occurred in 3-point shooting during the playoffs has mostly been team-wide. If I recall correctly, Manu Ginobili in a blog post even went so far as to say one of the primary reasons for their loss to the Grizzlies was the inability of everyone in the team, save for RJ (RJ!), to consistently rely on the weapon that had made them so deadly all regular season long.
As for getting abused by post players, I think perception is key, and I think Matt Bonner is getting victimized somewhat by subtle forms of discrimination as a result of his physical appearance. I'm not saying Bonner is a great or even good post defender, but I think given the physical tools available to him, he's made the most of what he's had to at least be passable on that front. But the fact is, it's fairly easy to think otherwise because he doesn't fit the profile of a conventional big man; that is, he's white and has red hair. I mean, let's be honest here: if Matt Bonner looked like Shaq, he wouldn't be accused of getting "abused" on the post nearly to the same extent. But because he looks soft and unintimidating in every conceivable way, then he becomes an easier target for criticism in that area.
As an aside, if you don't buy the notion that first impressions or physical appearance plays that big of a role in life, then may I recommend Blink by Malcolm Gladwell?