If they bothered to look they'd find that anti-discrimination laws are state laws, and the Tennessee anti-discrimination law does not prevent discrimination based on sexual orientation. So the hardware store owner's actions, while distasteful to some people, were not illegal.
“So the hardware store owner’s actions, while distasteful to some people”
Distasteful to loathsome perverts and their idiot supporters.
F them. They should have no say in anything, ever.