Of course I understand why the U.S. bombed Serbia. For the same reasons, in the last 30 years, the U.S. bombed – Libya(twice), Afghanistan, Iraq(twice), Grenada, Panama, Somalia, Sudan, and they want to bomb Iran and Syria..

The only thing those other examples are missing are Albanians. And that's why it is not off-topic. Discussing Albanians is not off-topic as long as it relates to something to do with Slavs, which in this case is the 1999 bombing of Serbia.