in serving an empire?
A republic and an empire are mutually exclusive. You can have one or the other but you cannot have both.
The people that Chris Kyle 'defended' us from were doing what any armed American would do if FOREIGN troops came and OCCUPIED his neighborhood.
You're saddened because Paul did not ingratiate himself to the memory of a man who voluntarily signed up to 'defend' American freedoms by killing poor people overseas.
As a military person you believe that your service is in defense of my freedoms. Then please inform me, what's your battle plan for NDAA and the Patriot Act?