I'm not one of the downvoters, but my guess:
1. It's really irrelevant political squabbling. It's annoying, but even worse, that kind of sidetrack can ruin sites by bringing in people who seek nothing more than to argue. I've seen it on other sites. Probably a lot of people want to avoid that kind of slide.
2. Your apparent argument is illogical. "Racism is a form of collectivism, and that phrase is indisputably collectivist [and thus that phrase is probably racist]" reduces to "X is a form of Y, and Z is indisputably Y [and thus Z is probably X]," which can be substituted with "A murderer is a form of human, and you are indisputably human [and thus you are probably a murderer]." And if you didn't mean to imply that the phrase was tinged with racism because it was collectivist, then it's an irrelevant reference to Ayn Rand, and many people find Ayn Rand references annoying enough when they're on topic. It doesn't demonstrate anything either way.