I’ve heard about a lot of the cartel violence in Mexico. It is out of control in some areas. But it didn’t seem to be that prominent on the US news.
But yes, while there has long been tension with some groups and border security, it hasn’t reached this level in a long time thanks to all this wall talk. This issue is beyond rational measures for some border security, but a rally point for establishing and demonizing the “others” who are “clearly” the cause of so many problems in the US. It’s become the front for some perverse culture war.
Related: A much more somber tune from Mexican Institute of Sound than usual. One can google translate the lyrics.