I do not believe those two responses are unrelated. Amazon is a company for whome PR is a key product. While excellent customer service is key to their growth, their PR campaigns are key to their stock valuation. This is why they put out non-starter products like the Fire Phone and hoaxes like "Drone Delivery" and release numerous il-concieved but good for a press release products (amazon menus, amazon movie listings, the whole search engine fiasco, etc.)
Bezos takes the high road-- "Oh, we're not like that" (which to anyone who has worked there rings really hollow as Bezos is someone for whome reality is pretty plastic. He has a reality distortion field of significant power)... meanwhile thru backchannels work to discredit the employee telling the truth.
Given what I experienced there, I can believe that all the dirt they are slinging at this employee is post-hoc ergo propter hoc rationalization.
When I attempted to transfer within Amazon, I was attacked by my boss and HR, and when I resigned I was fired. (Of course, you can't fire someone who has resigned but that's a truth that is not reflected in Amazon's employee records.)
Now I'm a "disgruntled" employee who was "fired" for the "crime" of attempting to transfer departments after getting an offer from AWS, and then resigned when his transfer was blocked by his boss (something explicitly forbidden in Amazon's policy handbook, but of course such rules are there for propaganda more than anything else.)
This allows them to spin anything the former employees says as sour grapes.
BTW, as part of leaving I was made to sign a terrible agreement, under threats that I now understand to have been extortion (because they were illegal under Washington State law) that included, among other things, that I would never publicly speak ill of the company. I am doing so now because I'd be happy if they sued me- I have lots of stories to tell reporters.