You haven't been looking in the right places. See Melnik, Nesebar, Burgas, Sozopol and so on. Of course some of them have it in a separate section, but that's hardly necessary for most small settlements.
As for your thinking that certain users are obsesesive, that's irrelevant. These place have Bulgarian alternate names, because lots of Bulgarians used to live once. That is sufficient according to Wikipedia policy. And since you have also been deleting historical sections, you argument is quite hypocritical.