Possible Clues:

• Asian last to rattle adversary
• Attacking person as paragon of virtue outside US city
• Alsatians let loose to find aggressor
• He is hostile, letting out Alsatians
• Attacker like skipper a nutcase
• Attacker from South America, one coming in at an angle
• Attacker is a fool to trouble six-footer
• Aggressive type letting Alsatians loose
• Fool's hurt? Six-footer is the attacker
• Aggressive type having trouble in a ship with colonist