First of all ancient bulgarians weren't turkic, this has been proved by genetic and anthropological studies.
Yes we may cluster, with northern greeks because they are hellenized slavs.

bulgars cluster with greeks and romanians (balkan pops) more than with serbs

I can live with that.
BTW why your first post is about bulgarians being slavic or not

Ancient Bulgars are related to modern Tatars (tatar being a derogatory term for Bulgars by us slavs). Ancient bulgars were turkic, greek scribes described them as being short, ruddy, asian faces. They even called their homeland Tourkia. Come on man. Nope nothing against you, but you seem to have some complexes against serbs? My thread remember? As I said, I regard you as slavs just not genetically. I even regard Macedonians as bulgars so there you go?