Your examples are fine and they support the thesis of "togetherness" of various countries. I don't know if we could call this a common "civilisation"- in my book, Morocco or Afghanistan are as different to Bosnia as can be. The only thing that combines them is the (to an extent) common belief. If a fanatic Muslim sees what he thinks is his belief attacked anywhere on the world (that could be a burning mosque in America), he will consider himself attacked.
As for the Muslim countries supporting Bosnia or Russia supporting Serbia, I think the supporting countries used the argument of being 'related' to gain some influence in the area. Russia and Serbia have always been close allies, due to the fact that they are both Slavic; but how come Russia does not support other Slavic countries like Slovenia or Croatia, then?Because in Croatia and Slovenia catolicism is a predominant religion, whereas in Serbia it is orthodox christianity(same as Russia)-Huntington addressed this fact in the book.
As for Germany supporting Croatia, that was a foreign political coup stemming from the country's reunification and had very little to do with anything else.
I do not deny that civilisations exist, I only think that the borders between them have always been blurred, and in our times, it is not only more difficult than ever before to draw a clear line, but also more dangerous, for a lot of reasons. You are right about that, making blocks of any kind(religious, ideological...) is dangerous, and is a first step towards hostilities. I think that the purpose of his book is to warns us of this. History taught us that all too well.Lets just hope that the last hypothesis in his book will remain in the domain of fiction. Well, this was a nice debate, don't you think?