These kinds of statements are the result of a wretched game of Telephone. "White supremacists are using the OK sign as an identifying signal" became "Crazy leftists say the OK sign is racist". It's an effective recruiting tool on the uninformed.
I have, however, heard the term 'racist' accurately used to describe people making an inverted OK sign when said people happen to be standing at a Proud Boys rally, or by people who otherwise spend their time hanging out with, or trolling as, white supremacists. [^1]
Same deal with milk. It's only racist when it's being used as a symbol by people who are intentionally being racist:
> "One slide Dr. Novembre has folded into his recent talks depicts a group of white nationalists chugging milk at a 2017 gathering to draw attention to a genetic trait known to be more common in white people than others — the ability to digest lactose as adults." [^2]
That doesn't mean "milk is racist", or that drinking milk is racist; it means unabashed racists seem to enjoy co-opting common symbols as code for their secret clubs.
[^1]: https://www.adl.org/education/references/hate-symbols/okay-h...
[^2]: https://www.nytimes.com/2018/10/17/us/white-supremacists-sci...
https://www.nbcsandiego.com/news/local/sdge-worker-fired-ove...
The circle of life on this sort of thing, I think, goes something like:
Come up with a contrived reason milk could be considered racist, film a video or whatever about chugging milk while making a racist screed, get criticized for being a weirdo, and then some reactionary clickbait site can have the headline "Internet user called 'racist' for drinking milk."
It is dumb, don't worry about it.
They spread the rumor that the OK symbol is racist.
Some people go to racist rallies and make the gesture.
Is it now a racist gesture? A gesture can't really be racist I don't think, it is the intent behind it. In the case of OK, it doesn't provide much extra information, right? If somebody is making it at a racist rally I guess it is a bit redundant. If somebody makes it while scuba diving I guess they are really indicating "OK."
The OK gesture was an effective pick because, it has mostly been supplanted by thumbs up to indicate all's good anyway. So it doesn't have much counter-pressure. I don't think milk consumption is going anywhere.
https://www.nbcsandiego.com/news/local/sdge-worker-fired-ove...
So, milk could become a symbol of this if used within that context. People are paranoid enough today that if a picture of someone enjoying a glass of a milk was published, they could assume it was a signal of this. And it could be, to be sure.
https://theconversation.com/milk-a-symbol-of-neo-nazi-hate-8...
The scary thing that should terrify everyone is we are going to come to a point where being called racist no longer matters or nobody cares, and then your gonna see REAL racism come back with a fury and force you wont like.