The connection between Latino immigration and criminal behavior is much overstated. Here is an excellent article, full of good information. Excerpt:
The overall age-adjusted national imprisonment rates are shown in Chart 1. Hispanic incarceration rates are now between 13 and 31 percent above the white average, depending upon which age range we choose for normalization purposes.
Another important point to emphasize is the wide disparity in white incarceration rates throughout the country, even when adjusted relative to the number of whites in high-crime age ranges. For example, age-adjusted imprisonment rates for whites in large Southern states such as Florida, Texas, and Georgia may be 200 percent or even 300 percent higher than those for whites in large Northeastern or Midwestern states such as New York, New Jersey, or Illinois, as shown in Chart 5. Although it is impossible to disentangle completely how much of this gap may be due to higher criminality and how much due to harsher judicial systems, it seems likely that both play important roles. So even if the age-adjusted Hispanic incarceration rate is somewhat above the white rate–perhaps 15 percent higher on average–it still falls close to the center of the overall white distribution.
Don't forget this:
Nearly all of the most heavily Latino cities have low or even extremely low crime rates, and virtually none have rates much above the national average. Eighty percent Latino El Paso has the lowest homicide and robbery rates of any major city in the continental United States. This is not what we would expect to find if Hispanics had crime rates far higher than whites. Individual cities may certainly have anomalously low crime rates for a variety of reasons, but the overall trend of crime rates compared to ethnicity seems unmistakable.
…if we restrict our analysis to major cities of half a million people or more and compare the average crime rates for the five most heavily Hispanic cities–Albuquerque, Dallas, Los Angeles, San Antonio, and El Paso–to the those of the five whitest–Oklahoma City, Columbus, Indianapolis, Seattle, and Portland. This time, the more Hispanic cities are the ones with the lower crime rates–10 percent below the white cities in homicide and 15 percent lower in violent crime. A particularly remarkable result is that gigantic Los Angeles–50 percent Hispanic and frequently perceived as a dangerous urban hellhole–has violent crime rates close to those of Portland, Oregon, the whitest major city in the nation at 74 percent.
Los Angeles today ranks as America’s least white European large city. Half of the population is Hispanic, and many of these are impoverished illegal immigrants and their families. Yet all crime rates have been falling steadily over the last two decades, with homicide dropping a further 18 percent just last year. As Chart 14 illustrates, most major crime categories are now back down to where they were in the early 1960s, when the population really did look very much like the actors appearing in “Dragnet” and “Leave It to Beaver.” And indeed, violent crime is now roughly the same as for Portland, Oregon, America’s whitest major city.
There is a lot more which I did not pass along, so read the whole thing. I thank The Browser and Ezra Klein for the pointers.