Propaganda again. Note the word "only". Serbs took land illegally from Albanians before the war and some of those Serbs were expelled in WWII. But WWII also brought an influx of 100,000 Albanians into Kosovo while Serbia was occupied by Germany. That influx was certainly greater than what was necessary to repopulate the Serb-appropriated lands. And as the link I gave you states: Serbs (meaning all Serbs) were harassed and attacked by the occupying Albanians.
On the other hand, in your confusion of even-handedness with objectivity, you fall once again for a pure lie of Serb propaganda: no evidence of any mass Albanian migration during the war can be found in any of the documents of the occupying powers. Only a few thousand people did move from Albania into Kosovo: some were officials brought in by the Italians or Germans, and the rest were Kosovars who had emigrated to Albania as a result of Belgrade's policy of ethnic cleansing during the inter-war years.
The Albanians from Albania had no reason to move into Kosovo, a disputed and already overcrowded area, before they came under the tyranny of Enver Hoxha (and after that, they couldn't. Like half of the Serb's lies, this one can be exposed by a mere few seconds' reflection upon its plausibility.