Everyone that posts in r/cryptocurrency has an agenda (including myself).
Most of the posts there are ways of confirmation biases - it's very difficult to get someone to see what they don't want to see in his/her cryptocurrency.
There are certain coins that are exceptionally polarizing (Ripple and IOTA come to mind) - it leads to this my coin vs your coin behavior. It's so fascinating, yet odd at the same time.
I read about 3/4 of the emails before coming to the conclusion I had no idea what was going on.