The reason the ideological Right has limited cultural power (as David Brooks claims) is because the Left has worked very hard for at least four generations to eradicate everything from the culture that betrays any sign of Christian influence or Western tradition.
And the reason that they are failing despite their near-complete control of the cultural high ground is because they have literally nothing to offer in its place. All they ever had to offer was reaction, negation, ugliness, filth, and snark.
Sure, you can adulterate Christmas, and you can substitute Silver Bells ... and We Wish You a Merry Christmas, but at the end of the day, either you come up with a substitute for Christmas itself or your efforts will eventually prove futile.
We not only can win this cultural war, we cannot lose it so long as we continue to create things that are good, beautiful, and true, and continue to refuse entrance to the infiltrating wormtongues...
Let them continue to preen and posture and sneer and snark in futility. It will avail them nothing.
Like their Father the Devil, they cannot create, they can only corrupt.
Vox Day, paraphrased