In a scenario where people think they can talk, I say let them come. People can sometimes be rude, which is not the right approach to growth.
Truly, peace matters. It is necessary, but when your action towards letting peace reign is taken for granted, I sayer them feel the heat of their actions.
Not apologizing was a very reasonable approach to such a bitter being. We need to train those who refused to be trained or weren't trained well.
There's no time for shit taking.