Knife Red

What does a hunting knife on the waist with a red badana wrapped around it mean in outlaw biker tradition?
I went into a bar a few minutes ago and these young scruffy looking biker gang members were showing off there backs to me by sitting on the bar table . The one guy had a very large knife in a holster on his waste with a large red bandanna wrapped around it .He had a large chain around his right shoulder which I presume is a weapon disguised as a fashion assessorie. Can some one shed some light on this? I didn’t like the way there were acting so i drank one beer and left and as I was leaving the guy with the knife was sitting on the bar room table and yelled “what only one beer? ” “oh you must be a cop on a snoopy mission” I laughed and walked out. i live in south carolina and i don’t think there were from around here . I could get a good glimpse of there gang patches but it started with Mud somthing Brotherhood
They were members of a white supremacist biker gang. Red laces, red suspenders, and red bandannas are all symbols used by white supremacist gangs. They also use the term “mud people” as a nasty, derogatory term for all non-white, minority people.
No Knife – The Red Bedroom