That line is real.
“He could could explain the the Stars and Bars commemorates his ancestors who were stripped of their rights and property because that they lived on the wrong side of the Mason-Dixon Line.
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That would also be the US flag where the North held slaves during the entire time of the Civil War. Lincoln’s emancipation proclamation didnt free a single slave held by the northern states. Slaves were not free in the US until the 13th amendment. Sorry you learned your false history in public schools.