Did you bother to read the article? It does not show illegal aliens commit less crime, it just refers to a second article in which someone just states it. And that's not what the referenced study is even about.
And its not true that illegal immigrants commit less crime than Citizens.
http://www.breitbart.com/big-governm...es-in-fy-2014/While illegal immigrants account for about 3.5 percent of the U.S population, they represented 36.7 percent of federal sentences in FY 2014 following criminal convictions, according to U.S. Sentencing Commission data obtained by Breitbart News.
According to FY 2014 USSC data, of 74,911 sentencing cases, citizens accounted for 43,479 (or 58.0 percent), illegal immigrants accounted for 27,505 (or 36.7 percent), legal immigrants made up 3,017 (or 4.0 percent), and the remainder (about 1 percent) were cases in which the offender was either extradited or had an unknown status.
Broken down by some of the primary offenses, illegal immigrants represented 16.8 percent of drug trafficking cases, 20.0 percent of kidnapping/hostage taking, 74.1 percent of drug possession, 12.3 percent of money laundering, and 12.0 percent of murder convictions.
I wondered about the data, so I looked at the US Sentencing Commission report,
http://www.ussc.gov/research-and-pub...ing-statisticsThe data is correct, illegal aliens commit violent crimes at a far greater rate than US Citizens.