You're a little bit confused it seems. What has all this to do with the right to self-determination for the Krajina Serbs and the Bosnian Serbs? The fact that there were many difficulties in Yugoslavia during the 1980's does not make their claim to seccession, in response to Croatia's and Bosnia's seccession, invalid.If you go by that, then you give up Kosovo.
So make your pick, Kosovo or "Krajina".
Albanians were a minority not a Nation like Croats and Serbs in the former Yugoslavia. Your premise in comparing Kosovo and Krajina is intentionally wrong.
Read again:
their claim to seccession, in response to Croatia's and Bosnia's seccession
So tell me, when did Serbia leave the Yugoslav Federation, so that Kosovo could claim seccession from Serbia in response to that?