I didn't personally boo the BLM knee gesture before the game for precisely the reason to have done so could have been misconstrued as racist and Clive is absolutely right to say that respect should be observed.
However where I disagree is that the BLM association with the gesture is irrelevant or tiresome. For many people it is and will permanently be linked to an extremist, anarchist, political movement which has demonstrated considerable violence; that sits very uneasily. No matter how much people are trying to row back from that link and disassociate the two issues, the reality is that mud sticks and some people wish to express their opinion that they are unhappy with that perceived link.
It would probably be helpful for everyone to move the whole situation on with a fresh, non politically linked solution. The issue of racism belongs to everybody in society and should be above any notion of political association, point scoring or a tool to be used for even causing racial division.
I'd forgotten about the National Anthem being played at the PO matches so was taken by surprise to be politely asked to be upstanding for it. My immediate thought when that happened was wouldn't it be better if at a game the same polite request could be made for people to 'stand against racism', either in reflection or with applause. No right minded person could do anything other than gladly support that untarnished, simple and clear message. Anybody booing would be shown up for the bigots they are and dealt with accordingly.