What Trump has proven is that millions of single issue voters can be created on any issue if a political party desires it.

Underestimating this reality will only keep political parties that depend on unwritten rules of decorum from winning more and more elections.

There are now new unwritten rules of election issue decorum. Which is to say there are no longer any unspoken rules of election issue decorum. I'd strongly urge everyone to acclimate themselves to that reality sooner rather than later.