Support can be a hard, unforgiving job. You get abuse and you feel the temptation to lash out. I saw this on Twitter this morning:
“I’m disgusted by what you do, but I respect you” pic.twitter.com/4QeUsfBlO2
— Federico Viticci (@viticci) March 18, 2016
Firstly, yes, the tone of both emails from the end user are unacceptable. The first one is a bit rude, the second a lot. Having been on the receiving end of similar messages in the past, both for my software company and in my day job, I feel for Federico.