Trump is a spokesmen for all the anger that people have towards traditional politicians and the traditional political and government systems. His sound bites are loud, simple minded and inflammatory and thus totally unlike what traditional disciplined politicians would ever say. He is the anti-politician. I believe that people are attracted to him on such a visceral level that they excuse or applaud his insane comments with out wondering what the consequences would be if put into action. He may last quite a while as long as people are angry and rebellious. Eventually Trump will have to outline in detail his policies.
Lets see if Trump's detailed policies run the test of time.. Then his followers will be force to think about his policies beyond using him as simply a reflection of their own anger.