I notice you completely ignore our own war crimes, as determined by Amnesty International, in the Balkan civil war and instead just list those on the Serb side. You refuse to acknowledge our targeting of civilians. THIS is what is driving Serbs into Putin's arms. There were many atrocities by other sides as well. As usual, only the losing side in a war is ever prosecuted for war crimes. We stepped into the middle of a civil war and chose a side. Could you imagine if Russia stepped in during our civil war on the side of the South?
There has always been ethnic slaughter in that region. The Serbs have a long history of being slaughtered by Turkish Muslims--particularly in Kosovo. Then there is the Kosovo ethnic Albanians and Croatians joining forces with the Nazis during WWII, slaughtering Serbs and Jews. Serbs sheltered the Jews from the Croatian-run concentration camps in WWII, including Madeline Albright's family. After WWII, Bosnia, Croatia, Slovenia, Montenegro and Serbia where held together as one country, Yugoslavia, under the Croatian strongman Tito. Serbs put up with him because he fought against Hitler unlike his ethnic brethren, and the Croats put up with him because he was not a Serb. Once he died these regions started their quarreling, each wanting to go their separate ways except for Serbia, who wanted to keep Yugoslavia a country. The regions proceeded with their ethnic cleansing to become de facto separate countries, eventually with the help of the US bombing, resulting in horrific civilian casualty figures on all sides. Nothing to be proud of for the US. We did not stop the killing, we only hastened the ethnic cleansing, which left no else to kill.