All available evidence strongly suggests that Charles Murray is in fact a racist†, so this isn't a good example. What you instead want to say is that there's limited tolerance for the "diversity viewpoint" that "whites" and Asians are intellectually superior to "blacks".
There's an intellectually coherent argument to be made that our society is intolerant towards inquiries supporting racism. (It's not a good argument, but it will hold together logically).
There are fewer good arguments that people are hyperventilating about what Charles Murray represents.
† You can quibble with the terminology; if you believe "being tarred as a racist is even worse than being oppressed because of your race", you're welcome to replace "racist" with "racial supremacist".
There's an intellectually coherent argument to be made that our society is intolerant towards inquiries supporting racism. (It's not a good argument, but it will hold together logically).
There are fewer good arguments that people are hyperventilating about what Charles Murray represents.
† You can quibble with the terminology; if you believe "being tarred as a racist is even worse than being oppressed because of your race", you're welcome to replace "racist" with "racial supremacist".