First of all, Wikipedia isn't infallible. Second, genkaos and myself grew up on different sides of the world. Culturally different, and yet, in our own respective cultures we learned, however wrong it is, the implicit meaning of mongo when used derogatively. It doesn't have several meanings as you pointed out, it has one, which does not mean it is the same for genkaos. As you pointed out in the Wikipedia link, it refers to certain type of people. When used as an insult, towards to a, whether the person is white, Hispanic, black, whatever, it is implied that that person is that sort of person and a retard. Thus, my comment of it being racist as well.

Now, even if I had associated MongoDB with that explanation, and now that I do remember it's inherent meaning under a certain context, I take no offense in it since the people behind MongoDB didn't have that intent. Obviously this is an assumption on my part.

Let us not get derailed from the main point, which is the 'visceral' feelings that cockroachDB has on so many people as you mentioned in several comments. It is true, it happens to me as well. But not the word itself, but when I'm around one. Those feelings of fear, whatever, when around one are irrational. I don't remember the explanation why it's irrational, I've never worked in the field of psychology.