One man crashing a car and attacking people with a knife; there is mention of gunshots in the article, but no mention of whether the attacker had a gun.  The shots may have been fired by police.  As tragic and serious as it is, this hardly seems the stuff of a well-organized group.  So far, it does sound like one deranged lunatic.  Nonetheless, some will unfortunately give a certain "spin" to this, with comments like "The cost of diversity continues to grow."  We should take a breath and remember that murderous lunatics do not represent large groups; Dylan Roof does not represent young American males, Robert Dear does not represent Christians, the I.R.A. did not represent Catholics.  And so on.