There are two possible reasons, and I suspect it's a combination of the two. If the new rulers of the modern BBC were so confident and assured of the rightness of their ideology - commodified anti-elitism in lieu of real democratisation (if that much-abused word can ever be reclaimed) - then they surely wouldn't be so anxious to constantly denounce that which they have destroyed. Could it be that, somewhere underneath, they know that much of value has been thrown out and are secretly full of shame and regret over their own involvement?
But I suspect there is another, less reassuring, perhaps bigger element. These people really are riddled with obsessive hatred and intolerance of anyone who doesn't conform to their creed. Their contempt for anyone who dares to transgress - whether towards Reithianism or socialist-utopianism, or any ideology which isn't built on popcult fundamentalism - is, if anything, far deeper and nastier than the contempt of at least post-Reithians (who didn't really die until 15 years ago) for those who went against their principles, and far more dangerous because it is couched in terms of inclusivity and tolerance. It is far, far off those aims. It is the antithesis of true democratisation.