You say that as of those people have formed their own conclusions though, rather than being repeatedly told falsehoods like taking the knee is about something other than racism - for example that taking the knee indicates support for “a Marxist organisation”.
You play the hand you're dealt. Doesn't matter how people come to the conclusion they oppose; if the gesture in the zeitgeist has come to have those connotations, then it fails as a gesture. You can moan about the hows and whys all you want, it doesn't change the reality. The truth is the connotation of the gesture is inextricably tied with Black Lives Matter, and the connotation of Black Lives Matter is inextricably tied to extreme left wing politics.
That's why I started this discussion by asking what the end game of the gesture is. I mean look at this.
There are people like this who genuinely thought they'd take the knee and racism would magically disappear, and are oblivious as to why it's now worse.
It simply doesn't work as a gesture. That really is the be all, end all with it as an annoyance to me - if it worked, even remotely, then all power to it. But it clearly doesn't.