I work for a relatively new SME based in the Home Counties. I manage a team of 11. I'm new here (Ocober 2024), management training has been non-existent and there is a very slim company handbook. HR is a young woman who handles contracts. One of my team has taken to wearing a kaffiyeh scarf to work and talks a lot about the situation in Palestine. He attends rallies in London and has become very passionate on the subject. I should perhaps also mention that he has a history of MH issues which may or may not be relevant here: he does seem to have become somewhere fixated on this issue.
He's alienated a number of his co-workers: two of them are Jewish or have Jewish heritage/ family but there are others who find his expectation everyone will agree with him, and his obvious annoyance is people don't want to get involved, oppressive. Staff have asked me to ask him not to talk about this subject at work. One has reported that the colleague has a 'From the river to the sea' sticker prominent on occasion.
My manager is dials in on occasion from wherever he is and has a robust management style. I imagine he'd tell everyone, including me, to grow a pair and get over themselves. What do I do? Particularly given the potential MH complications?