It's just a symptom of the neo-pseudo-scientific political system. I can find plenty of articles that "fact check" my gut instinct that deporting illegal immigrants who commit violent crime will reduce the violent crime. A cursory googling will remind me that SF's ban on handguns, licensed carry, and other gun restrictions protect me. After all, if I were in danger, the police average under 8 minutes response time on…
Immigrant policy is mostly based on humanitarian grounds. But I'd still be surprised if it's actually a major driver of crime. Violent crime in higher nationwide than every developed nation by a huge margin. Our lack of healthcare, for-profit opioid sales and the endless flow of firearms are the things I'd point to.