there , a multitude of physical phenotypes was always on display : red-necked , white-armed trailer trash ; seriously armed african american gangsta rappers ; hard-nosed expat taiwanese and korean mom and pop small business men and women ( armed with an always loaded shotgun close at hand behind the shop counter ) ; glock-packing middle-eastern phd geniuses reduced to driving taxis and more and more and the memory made him marvel at the material diversity - the tossed salad of racial genes - that comprised his fellow californians .