Did you even read it?

  The letter specifically mentioned the way Musk had used his platform on X to make unjustified and divisive statements that served to inflame right-wing thuggery and racist violence in the UK.
  I gather that at this point the Royal Society Council opted to consult a top lawyer to determine whether Musk's behaviour breached their Code of Conduct. 

Promoting peaceful debate is arguably a core aspect of scientific integrity. My impression is that the author would be just as miffed by someone spreading misinformation about GMOs that leads to left-wing thuggery against crop research institutes.