What form of satanism? There are variations. I don't use types in this term. They are simply lost subjects who wander aimlessly and have no decency to stand up for their own shit.
But I am generally not a person who lives in biblical verses and looks for dogmas to find orientation. There are other ways.
Presumably this boot is simply an art object. Like so many other weird fashionable things. Some call it art. Who really knows.
Or the donkeys out there simply need more attention.
Go search for Balenciaga satan on X. Scroll through.
Fashion is fully satanist now.
Okay
But I don't use X. Nostr only. Better for your mental health. ^^