About that "Very few criminals among illegal aliens" push,

...But the government agencies that crunch crime numbers are utterly unable -- or unwilling -- to pinpoint for the public how many illegal immigrants are arrested within U.S. borders each year.

In the absence of comprehensive data, FoxNews.com examined a patchwork of local, state and federal statistics that revealed a wildly disproportionate number of murderers, rapists and drug dealers are crossing into the U.S. amid the wave of hard-working families seeking a better life. The explosive figures show illegal immigrants are three times as likely to be convicted of murder as members of the general population and account for far more crimes than their 3.5-percent share of the U.S. population would suggest. Critics say it is no accident that local, state and federal governments go to great lengths to keep the data under wraps.
Gee, I wonder why?
Statistics show the estimated 11.7 million illegal immigrants in the U.S. account for 13.6 percent of all offenders sentenced for crimes committed in the U.S. Twelve percent of murder sentences, 20 percent of kidnapping sentences and 16 percent of drug trafficking sentences are meted out to illegal immigrants.
Dreamers, one and all, we're told.
Adams opened a rare window into the dearth of public data when he obtained an internal report compiled by the Texas Department of Public Safety and revealed its contents on his Pajamas Media blog. The report showed that between 2008 and 2014, noncitizens in Texas -- a group that includes illegal and legal immigrants -- committed 611,234 crimes, including nearly 3,000 homicides. Adams told FoxNews.com that other states have also closely tracked illegal immigrant crime, especially in the wake of 9/11, but said the statistical sorting “is done behind closed doors.” States closely guard the statistics out of either fear of reprisals from the federal government or out of their leaders' own insistence on downplaying the burden of illegal immigrant crime, he said.

My first thought is "God knows what the actual numbers are."  Remember, these are the numbers dug out with a lot of agencies trying to hide them; if we knew the real numbers...

And, of course, the protest will be "That's Faux News, you can't believe them!"  Well, we sure as hell can't believe the feds.  Or a number of states, like Californicated.  On this, I have to go with Fox.