But yes, we did get an earful about Serb atrocities, perhaps because those were the most visible and obvious ones.
A whole different question is, what is in the national security interest of the United States, and what promotes the stability of Europe?
An appropriate question. Less conflict and more stability might be good place to start (sorry for stating the obvious). Letting Croatian or Serbian nationalists handle security is not in anybody's interest except those two groups.
As an aside, was it in Europe's and America's best interests when the Croatians ethnically cleansed the Krajina Serbs? I think we all know who aided and abetted that one.
Except for many, it does not seem to be so obvious. The argument that what happens elsewhere is none of our business has lost a lot with the proliferation of WMD technology & globalization of communications & travel. Condi Rice & Colin Powell have both addressed this--we cannot afford to have places where terrorists or others who seek to do us harm can hang out & get organized, equipped, & trained to attack us.