David Brooks (no raging "liberal", remember) has an op-ed column in The New York Times about the "wall." Some excerpts:
"The number of illegal immigrants flowing into this country is dropping, not rising. The flow of total immigrants peaked in 2005 and has been dropping since. The share of immigrants coming from Latin America is falling sharply. Since 2008, more immigrants have come from Asia than Latin America, and the disparity is growing."
"There are more Mexicans leaving the United States than coming in. According to the Pew Research Center, there was a net outflow of 140,000 from 2009 to 2014. If Trump builds his wall, he’ll lock more Mexican immigrants in than he’ll keep out."
"Trump plays up the alleged threat of crime committed by immigrants. But the overall evidence is clear. Immigrants make American streets safer. Roughly 1.6 percent of immigrant males between ages 18 and 39 wind up incarcerated, compared with 3.3 percent of native-born American men of the same age. Among native-born men without a high school diploma, about 11 percent are incarcerated. Among similarly educated Mexican, Guatemalan and Salvadoran men here, only 2 or 3 percent get incarcerated."
"One study of 103 cities between 1994 and 2004 found that violent crime rates decreased as the concentration of immigrants increased. Numerous studies have shown that a big share of the drop in crime rates in the 1990s is a result of the surge in immigration."
"Trump plays up the threat of terrorism. But the real threat is that our border agencies spend so much time tracking down people who want to be gardeners that they don’t have the resources to track down the people who want to be suicide bombers. Fighting terrorism by going after the whole swath of immigration policy is like fighting germs with a sledgehammer."
"There’s a reason Republicans from Reagan to Bush supported reasonably open immigration policies. They are and have always been good for America."
"A new summary of the research from the National Academies of Sciences, Engineering and Medicine found that immigrants are integrating into society as well as ever. The bulk of the evidence shows that immigrants have a hugely positive effect on total American G.D.P. while having little effect on overall wages. The surge in Asian immigration will bring a gigantic number of highly skilled people, who end up with higher education levels than the American average, higher productivity levels and higher incomes. "
And from this humble correspondent: The animus against immigrants is a combination of racism, paranoia, idiocy and misinformation. Certain politicians or would-be politicians hook these things and stir up unfounded fears, ride the sheet-tails of racism, and spread misinformation to preserve the idiocy and build their support from the worst and most erroneous feelings within us.