People commit evil because government requires it. I'm not talking about those who work directly for government-- which is obviously wrong.
Gun shops run background checks and keep records of every sale, not because it’s necessary, but because government bullies them into it. It will put them out of business by revoking their "license" and cage the employees and owners if they don't do wrong by following the government rules. So they do, and I can't really blame them too much.
So many people feel they have no choice but to do government's dirty work against their customers, friends, neighbors, and family members. The threat of not doing so is too great.
Look how many violate life, liberty, and property because if they don't comply, they'll face the same fate as gun store owners/employees:
Car manufacturers and dealers, doctors and pharmacists, retail stores, social media sites, carpenters and construction, etc.
Any business deal should be between you and the customer, not between you and the customer at the whim of the state which makes the seller steal money in the form of taxes and fees from the customer, and makes the customer accept inferior products and services because government says so.
And when a business feels it is necessary to sell out its customers to the state, in whatever way it happens, that's even worse.