I think you make a good point about collective responsibility, and it's really quite crazy to see suggestions that a good answer to ethnic cleansing is more ethnic cleansing. This is quite literally how the whole conflict started in the first place. One would hope some lessons had been learnt since the 40ies.
However, I would advise caution in regards to historical parallels you bring up. At the end of the WW2, millions of Japanese colonists have forcibly expelled and the same happened to millions of German civilians, where at times they were displaced from the regions where they've been living for hundreds of years. Then of course you're familiar with has been happening to white population in many African countries following the decolonisation. After the fall of the USSR, Baltic countries have been doing their best to push out their Russian minorities. The unfortunate reality is that "population exchanges" and "repatriations" have been common methods of righting the historical wrongs in the modern era.
However, I would advise caution in regards to historical parallels you bring up. At the end of the WW2, millions of Japanese colonists have forcibly expelled and the same happened to millions of German civilians, where at times they were displaced from the regions where they've been living for hundreds of years. Then of course you're familiar with has been happening to white population in many African countries following the decolonisation. After the fall of the USSR, Baltic countries have been doing their best to push out their Russian minorities. The unfortunate reality is that "population exchanges" and "repatriations" have been common methods of righting the historical wrongs in the modern era.