Even if you may not have one belief and you have made an "ok" symbol to say "ok", if someone takes a photo, and they pretty much paint you as someone with a particular political belief, because you made a particular gesture that could perhaps be linked to a political belief, you may lose your job.
That's cancel culture.
It's simply easier to just do what the mob says otherwise you will get overwhelmed, in terms of handling PR, to begin with, when they can easily say "This company supports someone with a political belief, boycott them". You may not have the funds to defend yourself, and the time you spent investigating the issue could be also the amount of sales you may lose. So the easiest way out for you is to simply let this person go.
edit: added latest paragraph