Why Russia sides with Serbia?
...If you want an idea of why the Kosovars disagree take a look at this BBC graphic which shows the population by ethnic mix of Kosovo.
President Tadic told the UN Security Council there were "dozens of various Kosovos in the world and all of them lie in wait for Kosovo's act of secession to... be established as an acceptable norm".
"If you cast a blind eye to this illegal act, who guarantees to you that parts of your countries will not declare independence in the same illegal way?" he asked.
It is easy to understand why Russia would be concerned that states like Chechnya might declare independence and leave. In the US we have already fought a war over such things.