After seeing your screenshot, I'll stick with my earlier answer. Fight only if you feel like fighting will be fun. Otherwise, ignore him. You've got Machine Guns, a 60:60 strength ranged unit. He's using 34 strength Rifles that will take a lot of damage if they even dare to attack a Machine Gun.
Your rebuttal will be fully automatic belt-fed death. Assuming he ever gets the stones to try an attack. I bet he won't.
Your rebuttal will be fully automatic belt-fed death. Assuming he ever gets the stones to try an attack. I bet he won't.