Aggressive communicators tend to be:

Attack and criticize others in a loud voice

Explanation: Aggressive communicators are those who transmit a message in an aggressive way, where they do not take into account how the other person may feel. They can humiliate, speak ill of others, and blame.

Aggressive communication is a way of demonstrating the weaknesses or fears that the person who communicates has since he uses aggression as a form of shield and responds to something that he perceives as an attack or threat.