Muslim migrants coming to Poland and killing each other? How can that be?
We are told repeatedly that these are highly skilled, over qualified teachers, doctors, lawyers and IT experts who are doing the jobs Poles refuse to do. Their presence is a living example of tolerance, peace, diversity, inclusion and respect which Polish men lack (but not women of course!).
It wasn't murder because migrants do not have hatred in their hearts and are not prone to violence.
And the prescient virtue-signalling OP already gave us the answer for what really happened!
These two migrants elected to come to Poland but that meant they had no choice but to practice self-defence on each other because:
rightists would like to round up all...Muslim immigrants etc and close them in concentration camps
See, because of "rightists", Muslim migrants are forced to carry knives to protect themselves and Polish men (not women of course!) are solely to blame.