Answer:
Rudy's ego-defense mechanism is projection.
Explanation:
In the field of psychology, a projection can be described as a mechanism of defence in which the ego of an individual tends to defend itself against unconscious impulses or qualities by denying their existence in themselves while attributing them to others.
The same mechanism of projection was being used bu Rudy when his ego caused him to suspect every other person while he had the same unconscious thoughts.