I think one of the real problems comes when people can't distinguish between remarks, critiques, or comments made about someone in their professional work capacity, not as a person.
I know a lotta folks in this business who are very talented or successful at what they do who I would not call "nice people". But I respect and admire their talents and the JOB they do.
The inverse of that would be someone who is a nice person, but stinks at what they do.
I really don't see where how nice a guy or gal is has any bearing at all on talking about the job that person does. I just don't get it.