I have no idea how conservatives feel about undocumented immigrants serving, but most would probably be simpathetic and honor their service. Just as a point of clarification the Pace quote was 200 non-US citizens, it did not say 200 undocumented immigrants. You make a strong case and don't need to overstate it. There is a long history of residents, who are not citizens, serving in the military.  Legal residents were subject to the draft and thousands served in Vietnam, Korea and WWII.