Soulja Boy RIPPED By U.S. Military Vet for Anti-Army Rap

A proud military veteran is demanding an apology from Soulja Boy -- after the rapper posted a video saying, "f**k the army troops."

Soulja ignited a wave of controversy this week over his new song, "Let's Be Real" -- which includes the lyrics:

"F**k the FBI and the army troops ... fighting for what? Be your own man ...
... I'll be flying through the clouds with green like I'm Peter Pan."

TMZ spoke with Fred A. Flores -- a disabled Marine Veteran who is now a commissioner for the L.A. County Veteran’s Advisory Commission. Flores tells us, "It's a very offensive statement ... especially with the 10th anniversary of 9/11 coming up."

Flores -- who has two children currently serving in the military -- calls Soulja "Ungrateful" ... adding, "He should apologize to ALL armed forces."

"[The rap] is very irresponsible," Flores stated ... "especially for a person who is an entertainer for the youth of our country."