Context: the Thin Blue Line is symbolism for the role of police in maintaining public order. It has been co-opted by the alt-right. There is also a Thin Red Line to represent nurses. The French Wikipedia happened to use it in a legend to explain what the red lines on a map mean.
As a Frenchman who spends way too much time reading shit about US politics, I didn’t know about the thin red line. Pretty sure the WP editor didn’t either, or didn’t care (as he should).
I hope this is a troll post, otherwise maybe don’t give fascists the exclusivity on a red line on a white background?