I understand how you feel, but they aren't human. It's like getting mad at a dog, for behaving according to it's instincts.
To combat niggers, you have to be a calculating coldblooded fuck. You can't combat them with gassing nowadays, only legally. Which doesn't matter if your feelings get ahead, because you're likely getting fucked by the legal system then.
They have a good case against the nigger, but. I'm guessing they're too stupid to do anything noteworthy of it. For fucks sake, callers had to notify emergency services