Trump's rhetoric is an amalgamation of nutty conspiracy theories (Bush lied to get us in the Iraq war, Obama is a foreigner are two examples), superstition and a bit of hard truth woven in.
Many Trump supporters are those who feel left behind during the last few years.
The media tells us of "a growing economic recovery" but these folks know better. Most of the jobs created during Obama's tenure are minimum wage, part time, no benefits. We're changing to a two tier economic system, those with the good jobs and those without and the folks at the bottom are increasingly frustrated and desperate.
We've failed to admit to our economic depression (Bernie Sanders is an exception) and instead believe and accept that a 2% growth rate is acceptable (even commendable).  Fixing blame on the existing Republican or Democrat establishment politicians doesn't matter to those left behind. They want jobs, not handouts. They want their lives back and are willing to chance it with Trump.