text: The Chinese literally weren't allowed to immigrate as of the 50's. Irish and Italians were denied the same things until the 40's. The Japanese were in actual camps, with all their possession left behind or stolen in the 40's. All these groups are doing economically great these days.  Probably has something to do with average IQ. (Little hint: college educated black men have almost the same average IQ as your classic uneducated backwoods white redneck).