I went to a talk which presented the horrifying fact that immigrants are several times more likely to develop psychosis (varying from 2x to 10x dependant upon group, IIRC), and they theorised that some people have trouble empathising with people of other races, and this literally drives them insane. (Their other theory was that the cause is stimulant psychosis, but there wasn't evidence to support this as the primary cause)
I'd rather this wasn't the case. I quite like some level of controlled immigration, especially if they bring curry. But I worry that driving people insane is a fairly severe negative externality.
Did this study consider the difference between white and non-white immigrants to mostly white Western countries?
Did this study consider the difference between white and non-white immigrants to non-white countries?
Did this study consider the difference between immigrants who (try to) assimilate to local communities, and those who prefer to stay within national communities?
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