Why do suppoters say previously deported, have a criminal history / are immigration fugitives are not a threat?

Because illegal aliens from mexico have invaded CA and destroyed the white population. It was 95% white in the 50s, it was 80% white in 1970, and today is about 30% white in Southern CA. They don't care about America at all, and simply want open borders so they can invade the rest of the states too.