[VanDeKoik]

So what do people think, that when someone walks into a store like that, that are instincts would be that “oh he’s cool”?

Hell no! He is lucky a thinking gun owner didn’t blow his head off.

[ZX12R]

Hell no! He is lucky a thinking gun owner didn’t blow his head off.

That would be a non-thinking gun owner.

[Bob]

Hell no! He is lucky a thinking gun owner didn’t blow his head off.

What actions did he take or threat did he pose that would cause a "thinking gun owner" to decide that he needed to have his head blown off?

[Mathews]

A thinking gun owner would assess the situation, consider the options and act. If there was no display of intent, meaning he came in with the weapon at sling arms and kept it at sling arms, a thinking gun owner would would remain cautious and alert... but to draw on a guy for carrying a slung rifle...? I don't know about that.

[Mad Dawgg]

"He is lucky a thinking gun owner didn’t blow his head off."

A "thinking" gun owner who shoots someone who is NOT threatening anyone with a gun is not in fact a "thinking" gun owner he is an idiot.

The article said he had the gun slung over his shoulder. He was legal. Case closed.