Human behavior is that you chose for your own safety and own health even if others suffer. That is exactly what the majority of the Europeans did.
We will kill ourselves before our actions cause the death of an innocent life. That's Judaism, and you call a creature that has no problem with a holocaust of innocents because the economy is bad whatever you want, but I would at least use "human" loosely. Europe's interest was not to fill their countries with Arabs. They did, and many were the newly Terroristinian "refugees", because it makes Israel look bad. If I would eat scraps or eat caviar and all the Greeks in the city are killed, I would make sure to salt the scrap well and swallow the thing fast.
Don't worry, I expect Europe to take doubles of caviar, because Catholic influence put anti-semetism into the blood of Europeans for a millennium, and they didn't need to do anything, because Hashem already told us that the nations would hate us. Don't expect me to call England or Ukraine lovely.