Is a grocery store considered a strange context?

A friend of mine was open-carrying his pistol in his holster once and stopped at Walmart for some groceries. A woman called the police on him and claimed he was waving his gun around and threatening people.

So the police show up, talk to both of them, thankfully didn't shoot my friend, reviewed the footage and ended up arresting the woman for making a false 911 call.

Things like this give me little sympathy for people who find someone wanting to be safe in public "suspicious".

I know someone that caught a charge for brandishing in similar circumstances and unfortunately it stuck, so I truly am sympathetic.

That said, I think there's a difference between being suspicious and keeping your head on a swivel vs freaking out, calling the cops, or taking radical action