Red from all they bloodshed
America has been through hella wars, battles, etc., thus tons of blood has been shed.
Notice how red is also a one of the three colors on the American flag.
This is no coincidence either, the red on the American represents the blood that has been shed due to this country’s violent behavior/history.
The word “red” in this line is also a homophone of the word “read” in the previous line. They will have their palms “read” and “red”.
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