So wait til they start killing people openly before we identify their ideology as dangerous?
https://npr.brightspotcdn.com/dims4/default/ebf5da8/2147483647/strip/true/crop/186x272+0+0/resize/880x1287!/quality/90/?url=http%3A%2F%2Fnpr-brightspot.s3.amazonaws.com%2Flegacy%2Fsites%2Fwvtf%2Ffiles%2F201703%2FUnknown.jpegWhether or not an ideology is dangerous is besides the point.