I think that there's a subconscious belief that US institutions should be loyal to the white race, especially as expressed through the American spirit of our forefathers and their ideals of fair play, and that any cancellation based on expressing the same racial beliefs as the country was built on is basically sedition as a prelude to white liquidation.
Some white people feel like they're going to be forced out of the US like the US was forced out of Vietnam and Afghanistan.
Instead it's a workers' rights issue primarily (it shouldn't be so goddamned easy to fire people), and secondarily it's a problem of the commons that every venue for free speech is managed by an authoritarian institution solely motivated by its own survival and prosperity rather than any animating belief or core ethics. This is your culture on laissez-faire. Whether it's MIT or Facebook managing your culture, you're still free to give your opinion in the shower every morning.