I was wondering what the hell that even meant when I first saw it. Googling the phrase, there seems to be a consensus that it originates with Nazi Germany:
“One of ours, all of yours” is from Nazi Germany. It was coined when an SS officer was killed in a Czech Village. Nazis then killed every resident of of the village.
So much for dog whistles, eh? How long before they put up the slogan ‘work makes you free’ at prisons and detention centers?