The argument is not about someone acting on a foreign battlefield getting shot. It is about the changes in the law that are so poorly thought out & so poorly written that they allow the US armed forces to detain without charges American citizens right off of American city streets.
Combined with changes to Federal law that allow for persons in custody of the Federal Bureau of Prisons to transfer civilian inmates to military custody. Also the courts have ruled repeatedly that if you are a illegal alien & a criminal once you are in this country all the rights due to a criminal defendant will apply . This piece of legislation is an attempt to get around that.
This legislation does no such thing. You are being stampeded by false propaganda.