All I can say to urban blacks who are whining about Mexicans: What goes around, comes around! ;-)
ping
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Clearly, African Americans are committing violent crimes against Latinos as well, but there is little evidence that those crimes are based on race as much as they are for control of turf. And the notion that Latinos are killing blacks in an effort to "ethnically cleanse" their neighborhoods is extremely troubling. Many African Americans are especially perplexed because they remember that when we had the numerical advantage, African Americans did not target Latinos for murder to rid them from our neighborhoods. It would have been unthinkable.
the mexican mafia took over california prisons a long time ago. in addition to mexican-black violence, there are white supremacists, albeit few in number, but virulent.
there are a lot of ads here for ca prison employees; pay starts at $76k but immediately goes over $100k because they can't get enough guards, so there's lots of overtime. same with police and sheriffs' ads. few people want to work in these occupations.