I got my call “Greetings from the President of the United States” back in 1966. I went. Obviously the citizens of New York City did not in 1863.
Dude, despite the draft riots do some research on the new York regiments who fought for the Union Army, notably the Irish. And are you going to tell me there weren’t Southerners who avoided serving for ‘’The Cause’’? John Wilkes Booth didn’t serve.