Assuming (and I do not think it an assumption but a reasonable conclusion) Mr Trump is a narcissist, which would explain most if not all of his peculiar behaviors, we have the following ...
But what about his followers
Just as no group can be thought of as homogeneous, I believe there are several supporter types.
1. run of the mill Republican/conservative partisan of the most generic type (I suspect most of his Republican/conservative advisors and surrogates are this type) ... these are the high level right wing "snowflakey" types
2. run of the mill partisans (of both parties) who really held their nose, and puked as they pulled the lever
3. the large chunk of bigots who upon hearing the words "the wall" and "Muslim ban" knew they had a "savior"and disregarded everything else.
You may want to make this list more or less granular, but certainly group 2 & 3 are only interested in results i.e. is there a wall, did he ban all Muslims, will there be more coal mining jobs, etc. Type 1's don;t care about Mr Trumps agenda unless it is coincident with their agenda, which in large part it is i .e. will he follow through on deconstructing government. Only time will say if the full conservative destruction of government will be implemented or stymied by more thoughtful folks
Basically his supporters have a person who can be easily manipulated to ensure conservative extremism, who continues to talk the talk, and stir the pot. Why would they not support him? The question is, will it be enough for those who want the bigotry implemented or will it be enough if he can not pull it off?