I don't think it's true that progressives and radical leftists are consciously racist or homophobic, but I definitely think there's an element of truth to the control aspect. There is no better way in modern American society to smear or destroy someone's credibility or whip up the public into a frenzy than allegations of racism. It's become almost more of a stigma than actual murder, and it doesn't require anything close to the same level of proof.
and don't get me wrong, I guarantee right wingers would do the same thing if they could, but so far there's not an equivalent boogeyman they can use that carries the same impact of immediate universal scorn. It's been interesting to watch the Democrats completely co-opt the Republicans' "moral majority" strategy over the last 15 years by positioning themselves as the sole crusaders for secular truth and justice. With the widespread de-emphasization and abandonment of Christian beliefs and values in this country during that same timeframe (which is a good thing, mostly), it seems to me that woke social purification has become a new religion for much of the population, and I see a lot of parallels in their insistently dismissive emotional response to reasonable, intelligent debate and dogged unquestioning fervor for eliminating other viewpoints.
I believe that the vast majority of human beings are inherently, subconsciously tribal and instinctually desire some connection with a spiritual power greater than ourselves. Religion satisfies both of those impulses, and in the absence of traditional religion for most modern Americans, especially younger ones, we're seeing the rise of the church of political correctness. 90s right wing prayer warriors being superceded by modern left wing social justice warriors - meet the new boss, same as the old boss.
it's also interesting (from a clinical perspective - otherwise it's terrifying) to watch Orwell's concepts of Big Brother and thoughtcrime slowly become reality, but not as part of the totalitarian government he envisioned. Today Big Brother is just any random person around you with a phone and a Twitter account, and they are definitely always watching.