Your comparison is also apt because the brooding parent birds are too stupid to realize their own offspring have been displaced and continue to work hard and diligently feed the alien hatchling - just like Westerners.
Feel free to use that and you are absolutely right about the parents being too stupid to realize it and that being analogous to dumb Westerners.
Back in 1965 I was just a kid, but I realized that the immigartion act passed that year would be a disaster.
Our educated and intelligent leaders, on the other hand, couldn’t see this. They were even dumb enough to believe Ted Kennedy, a man who wouldn’t have recognized the truth if it spit in his face, when he said it wouldn’t.
Damn, I hate it when I’m right.