[chao-]

>sometimes you find someone akin to a hammer looking for nails, starts to label anyone a missing stair over the slightest incompatibility.

I 100% agree. This is why it is important for leaders not to rely on the judgement of a single person, but on the behavior of perception of the community as a whole (which I tried to mention as a caveat in my comment).

On the other hand, if you have an overeager moderator with too much discretionary power... well that's a different community problem, and it is going to go wrong in multiple ways, not just this one :(