Richard ,
I like the professional manner in which you responded to the slurs on your honorable profession.
The only thing wrong with your reply was to use a combination of psychology,pathos,logic while trying to extract feelings of remorse from the perpetrators.
These fellas do not respond to the use of your high intelligence and polite upbringing.You may have to lower yourself to their level and use more Cretan words of explanation.
Your sensitivity has risen you to a higher level
George