Not quite. Not all aggression should be met with the same force. There is such a thing as proportionality.

• A communist's existence on earth is aggression against humanity, but is to vague to do anything about.
• A communist's existence in a public area you enter is an aggression against the public, and he should be roundly condemned. Then forcible removal can be discussed and agreed upon with the necessary ordinary force.
• A communist's existence in a private area is an act of aggression against the private owner's rights, and you should force the communist to leave with ordinary force.
• A communist's existence in your private property is an act of aggression against you, and he should be physically removed as quickly as possible.