Every one of his insults is a projection:
Nasty
Low I.Q.
Not very smart
Weak
Low energy
Lyin'
Lazy
Crazy
Fraud
Lowlife
Fake
Radical
Disaster
Crooked
Phony
Loser
Bought and paid for
The worst
Overrated
Dopey
Disgrace
Cheater
Incompetent
A joke
Biased
Clown
Clueless
Failing
Wrong