Comment by voidhorse

What you are asking for is a slippery slope.

The history of humanity is full of biting polemics and attacks on the character of others, just read Voltaire. Sometimes, attacks are deserved.

Yes, a world in which everyone is professional and "plays nice" sounds great but it also quickly becomes a mechanism for suppression of the truth. Not the situation here, but "decorum" expectations are sometimes precisely one of the functions that help bad people maintain power (consider how difficult it can be for minorities or marginalized people to speak truthfully about what's happened to them). Sometimes one person being blunt, honest, and a little rude is a necessary step in clearing ground for others to be more upfront about the bad behavior of individuals.