Have you calculated how much additional pollution is directly caused by immigration to Europe and North America? If you haven't but you assume that the amount is substantial aren't you just spreading bullshit?
I love diversity: that's why I think we should stop trying to destroy it.
Calling such behavior "forced" is so inconsiderate. It blows my mind that you are trying to blame people for trying to find better lives. Should a lady in a brazilian favela not have washing machines? Should people not experience and use electric light or air travel? I also assume you are from the west which makes your position extremely arrogant as well.
I am very afraid of what the environmentalist movenment is turning into and would not be surprised to see major violent eco-terrorist events in the future. Makes me ashamed to support green policies.
So inconsiderate.