When was that written, 1950?!?!
Because everyone, whether they admit it or not, knows it's bullsh!t.
If someone actually does believe it today, then they truly are witnout any question, an idiot.
None Of those ethnicities complain today except one, and only half of them.
The other half, and the others listed, work hard to make something of themselves.
For a small percentage overall (that 50% of one single ethnic group), nothing...EVER.....will be good enough.