I even used the SCUBA shop, which is next door, for reference.
No-one that I've seen has advocated that the OK sign be abandoned for divers. I've been mid mouthful at a restaurant when a server has asked how my food is and I've made this sign and not been called a racist.
However, should I and half a dozen of my buddies, armed an in full tactical gear, standing 10 ft from a BLM protest, waving my Confederate flags, all choose to make this sign for a photo, then a _reasonable person_ may choose to interpret this as "we know exactly what we're implying here, and we're not all just telling the cameraman that "everything is perfect"."