Then the NATO states decided that Serbs were not entitled to likewise secede from Croatia and Bosnia, the latter of which burgeoned into a particularly bloody conflict. The United States and other NATO nations eventually lent their air forces to Bosnia and helped impose the bizarre Dayton accord, under which three antagonistic groups are supposed to live together in an artificial state ruled by international bureaucrats. Naturally, the administration says the United States can't leave, lest fighting break out again. Intervention in Kosovo, essentially lending NATO's air force to the Albanian Kosovars, would be even more perverse. The only thing worse than bombing Serb military units would be patrolling Kosovo's border with Albania in an attempt to cut off guerrilla arms shipments.
Civil wars are never pretty.
For good reason the West usually stays out of them. If the Europeans nevertheless want to go to war in Kosovo, let them.