Trump can be blamed for a lot of things, but starting today’s political discourse is not one of them. Has he added gasoline to a burning fire? Sure.
For decades, the Democrats have been accusing Republicans as racist, sexist, homophobic and xenophobic. Not to mention a basket of deplorables. Seemed to work because those terms are amplified in today’s politics.
Perhaps you don’t see it as civil discourse, but as a matter of fact?