I am a teacher at a secondary school. The other day, one of my colleagues wore a (red) keffiyeh scarf to work.
I can't decide whether this is inappropriate or not. I don't think anyone would object to a Ukrainian flag on a badge, but I definitely refrained from painting my nails blue and yellow when Putin invaded Ukraine because I had Russian ancestry pupils and thought it best to leave it outside the classroom. FWIW, I know we have some Muslim pupils and colleagues. We no doubt have Jewish pupils and colleagues too, I'm just not as aware of it. I know my colleague has some strong leftwing views. This has irritated me in the past and I am not sure whether that is influencing me now.