Self imposed genocide through ignorance and a belief system that is counter to ones existence is the fallacy of tolerance. When one is displaced, there is no longer any tolerance. Funny how that works.
Vultures being replaced by rats, disease, etc. sort of a parallel on society in general. We hold up certain symbols to be holy and they (really we) pass on that bubble to a generation who wonder how stupid we possibly could have been. They in turn, will do the same thing.