Delta Air Lines review: Flight boarding

I am a Delta recent flyer. when boarding on my out bound flight the gate agent stated all military, active and retired can board the plane. As a disable retired veteran, I appreciated that jester. However, on the return flight the gate agent statement was only active-duty personnel. when I questioned the difference between my departing flight, she became very irate to the point where she stated reads the rules. Other passengers got involved saying that not right. I appreciate the offer for current military members to board the plane first. To the airline I have a question retired and disable vets don't count. (Wow)! I am a retired 30 year of service veteran with disabilities. I think years of service and disabilities deserves something. Vets with over 20 years of service should have a retired ID card from the Department of defense. Disable Vets should have Documation from the Department of Veterans Affairs. It would be seen as deep appreciation for those that have served with honor. Thank you.