No reason to debate from the relevant specific to the general.
At issue is Russia’s illegal annexation of parts of Ukraine.
You are already deflection one level to Serbia. So, let’s at least keep it to the issue and your first deflection.
Serbia violated scores of international accords, protocols and law by slaughtering and ethnic cleansing. The evidence is not in dispute. It is recorded by confession, witness and pictures.
I don't dispute that and neither does any rational person. The Serbians were killing with abandon and having their way with the Muslim minority.
The question on the table is: Was it in the US national interest to intervene?
Of course that same question could logically be extended to any number of locales.
Actually this thread IS about Serbia.