I hardly think that encouraging someone to seek out alternative positions from which to view the world, and a suggestion that there is a grey area for all this

I hardly think that encouraging someone to seek out alternative positions from which to view the world, and a suggestion that there is a grey area for all this constitutes zealotry. Quite the opposite, in fact. And in my experience projects with unit tests are far _less_ riddled with bugs, which is the whole point, no? And I don't know understand why on earth you think I'm telling anyone they are "shit". I'd advise someone to broaden their horizons if they said they thought functional programming was worthless, or that assembly language was always pointlessly low level, or any one of a number of possible assertions that wouldn't sit well with me. That is far from "you are shit" - it's much more assuming they are not shit, but haven't had the right context yet.