<blockquote>Given the level of debate that this issue can raise <strong>even</strong> on Wikipedia...</blockquote>

As someone who has spent some time on Wikipedia (I use the same username there), I find this statement rather amusing. ;) For a long time Wikipedia has been a battleground for nationalists. If you are in a mood for reading wiki-drama, you can have a look at all the nationalism-related Requests for Arbitration, e.g. the one about Macedonia (it even has its own shortcut - <a href="http://en.wikipedia.org/wiki/Wikipedia:Requests_for_arbitration/Macedonia" rel="nofollow">WP:ARBMAC</a>).

If you are interested in Balkan history and the way different Balkan nations (mis)interpret it, you can have a look at the workbooks created by the Joint History Project. The PDF files are available in English for free:

http://www.cdsee.org/jhp/download_eng.html

(I guess this comment will be held for moderation because of the links...)