Yes, it is a choice. No, Vietnam didn't want us there, but we were there anyway. So, get over it. Either kill or be killed, buddy. It's a dog eat dog world everywhere.
Survivors is what everyone is.
You are the murderer. You are murdering the memories of the deceased and the meaning of American. Look at your rights, read your Amendments. Learn what it means to live in this country, and know that though we are far from perfect, we at least have these rights.