Yes, and I am saying this is a weird thing for a human to do (the explanation here is that the person was the one contributing to the list, and is overcompensating).
Making of lists of funny names is not the first step to genocide. Genocide is horrendous, but the reasons for genocide are complex and the notion of a pyramid to genocide based only on jokes or whatever...is just wrong (again, that is what I said earlier about people not understanding history, I think it isn't coincidental that history/politics education in the US is of very low quality). That view is based on an extremely narrow, individualistic notion of human action/events that has no correlation with reality (living in a society where everyone accuses everyone else of being a genocidaire is also not fun for anyone, it is not inclusive, it is not diverse...I am sure lawyers would love it, no-one else would).
This is the kind of thing that you would hope people can appreciate through common sense...but, unfortunately, that isn't the case anymore.
Also, the issue isn't about someone being fired for promoting genocide...again, this is one of the subtleties of argumentation that you should learn at school...DHH's point was only about why the person was posting the pyramid of hate, self-evidently he did not believe that anyone in the office was attempting to organise a genocide (why does this needs to be said). His view on the list was clear: the list shouldn't have happened, it was bad, people who made the list should have not made it (rather than making it, and then attempting to over-compensate by saying the list was the first step to genocide).
...the stuff that people argue about on here is truly amazing. Again, the US underinvests massively in history/politics/philosophy...these are problems that just don't happen in some societies.