For the last 100 years the Republican King makers have seen 'usefull idiot Presidents' as gifts from heaven. Now so does Russia.
Weaponized cruelty is the only thing on the menu at Trump TV rallies.
They are similar to right wing rude radio shock jocks.
People expect it and they get it. Donald is the Don Rickles of vindictive politics.
The cruelty of the show is the center of it. Donald is out there doing the worst kind of sadism which is to exploit the pain of grieving, whether its the parents of dead soldiers or the wives of deceased Congressmen or Senators like McCain.
The next day it is explained away by some anodyne statement like "He could have said it differently". So people are entertained by that Schaudenfreude secret pleasure of smacking down other people.

Why else do people like him? Ask people why they like him and you get the gutteral feeling of a backlash against authority, be it the FBI or CIA or anyone they don't like. Regular people are not driven
by poliicy or even the Constitution. Its immature and ill informed revenge.