Seriously- I can't believe I have to say this, but "How the Grinch Stole Christmas" isn't about ostracism, or capitalism, or anything like that.
My Jordan-Petersonesque analysis: the Grinch is about a man who has isolated himself from all of society (except apparently one sycophant who literally can't argue and whom he horribly abuses) and went to live in a cave high in the mountains because he was so misanthropic.
There he blocks out all of society who could shame him by comparison to his badness, except once a year when he hears the sounds of joy at Christmas and he can't block it out.
It's important that when the Grinch says he's irritated by the noise, he is lying to himself. It's not the who's lack of consideration or excessive noise that is getting to him, or his hatred of materialism. He tells himself that it is a hatred of their materialism because he is envious of their happiness, which he tells himself comes from their belongings, so he tells himself that he is right to hate them. Thinking that happiness comes from belongings is an inherently materialistic impulse, so the Grinch is not anti-consumerist, if anything he is more consumerist than the Whos. And so he envies their stuff.
And he takes them for everything they have. And then when he realizes that their happiness didn't come from their stuff, but from being part of a loving community, he realizes that he's been the one responsible for his own unhappiness via his self isolation. That's why he gives all the who's stuff back, and they are fortunately good enough people to immediately welcome him into their community.