You are leaving out the crosshair map of targets which the DNC had used in the prior election. Dems used the crosshair first. The Orlando massacre had nothing to do with either the Rs or Ds. The others you mention do have a relationship with extremists right wing thought, but what % of the Rs agree with that?

This shooter took a far left extremist stance. Very likely driven by the continual stream of negativity emanating from the left wing media.