It matters because the wording of the OP implies they're targeting citizens, but in reality they're getting caught in the dragnet. That's regrettable, but it's unclear how it's worse than any other sort of law enforcement, which also have false positives. According to wikipedia the felony conviction rate in the US is only 68%, which implies for every 100 "criminals" that are arrested, there are 32 "innocent" people. That's probably far worse than ICE's rate of catching citizens, so does that mean we can call the entire US law enforcement apparatus a "paramilitary force"? One final thing to note, Canada's conviction rate is even lower at 62%, and China's is even higher at 99.975%.