Trump isn’t “scared” of them; THEY are frightened of him and for no rational reason!
Trump is a classic narcissist.
You’re his wonderful friend when you cover him with praise and adoration.
You are his enemy when you don’t, and when that happens the classic narcissist (to shore up his lost confidence) rallies his remaining “friends” and enlists them to attack the apostate.
And if they don’t, they are singled out for criticism to make them fall in line.
The narcissist wants everything and everyone to be focused on them, revolve around them.