The article glosses over “ethnic Albanian” = Muslim. This is a Muslim vs Christian conflict. If it re-ignites, Trump needs to keep the US out of supporting the Muslim side.
Most of the post Cold War fighting in the FRY has been religious. Basically all are Southern Slavs, speak the same language, but Croatia was/is Catholic, Serbia was/is Eastern Orthodox, and Bosnia was/is Muslim.
The Kosovonians are not Southern Slavs but are ethnically distinct Albanians who are also Muslim.
I blame the Turks. Give Asia Minor back to the Greeks! Send the Turks back to the Central Asian Stans.