People claiming Andrew Kelley's remarks in this thread can't possibly be personal attacks surprise and sadden me.

If someone insults your ability to do your job, paints you as an opportunistic sellout, and thanks the stars for your riddance, saying someone shouldn't feel hurt because "we can separate personal from professional lives" says more about your inability to perceive your own hurtfulness than it does of that person's benevolence.

The minimum bar for tactful communication is to be courteous and empathetic. None of this had that.