The elephant in the room here is not Trump, or Stormy. It is the mass of rabid, armed and vicious Trump followers, who will do anything up to and including murder, if they perceive their god to have been wronged., or perceive in their warped collective grey cell that it serves their idea of justice.
The sexual relationship between the two was not a crime by either party, however repulsive it or they may seem. The crime was tax fraud by Trump.