that is a sick email for sure. and the other two must be even worse.
but Shrink from the outside looking in it seems to me if you associate frequently with thugs this is a likely response.
If you dont want potential emails like this you should have been doing something different and interacting with a different crowd the past 20 years.
These are not all church going law abiding, heroes, who are in this business.
And when they are angry they use these stupid masculine threating terms, we see this same language during harsh forum fights at time, that is what the street and criminal life has taught them. Thugs have no common sense and threats is how they articulate things.
There is no shock here.... Yes Im sure there are a great deal of the finest people you could ever meet in this industry (violins playing) but at least a portion of these people are low life criminal thug upbringing and you likely have interacted with dozens/hundreds of them in your career. You sort of reep what you sow. Im not trying to be harsh you have done a ton for the good side of this industry but these are the people you made to be a "Friend".
I do realize that I am a total nobody to be preaching to you at all on a subject this important, and your family safety is most importnat so take care of that situation.