#1. Thank you for your service. 
#2.  I assume you served in Vietnam in combat.
#3.  Were you a medic or Navy Corpsman?
#4.  If the answer to #3 was "no", did you protect yourself with a firearm?
#5.  Why is it  "not a normal business practice" to provide goods customers want?  
#6.  Why are you trying to impose your opinions on stores that choose to cater to their customers?  This IS America....if you don't want to shop there, you are free to shop somewhere else....but don't impose YOUR opinion on me, because if I want to purchase a firearm at any of those stores...I should be free to do so..just as you are free NOT to!