I think Kosovo was stupid, because Russia was on the verge of joining the fold in Europe, with that, though it gave the hardliners the ammo they needed to say, “See, We Told you So, you cannot trust The West.”
I agree completely. It would have been nice if the US had been more clever during that period. The US and a modern Russia would have made natural allies against radical islam and a rising China.
But that opportunity was lost. Heck, US Gen. Wesley Clark even ordered an attack on Russian troops in the Kosovo area! Thankfully, the British ground commander, Gen. Jackson, refused to obey. I'm sure Russia took note of all that anyway.
None of this implies that Russia would have made a good ally otherwise. But the chance to find out was lost.