Trump's immigration enforcement surges have taken resources and manpower *away* from activities by DEA, the FBI, and even Homeland Security Investigations that were actually dedicated to things like stopping drug trafficking, human trafficking, etc. All to round up people en masse who are mostly not violent criminals. There's even been a push to expand the pool of mostly-non-criminal targets by going after visas, birthright citizenship, the naturalization process, etc.
It was never about "violent immigrants". It is about rounding up arbitrary quotas of people who look and talk funny and making them go away.