By this framing, there can never be safety, because there are always going to be violent bigots.
Safety is about a state of mind, as they say in the article, but it has to be informed by physical reality on some level, and that will necessarily have to include the ability to not be physically victimized by bigots.
~~I also have a lot of issues with their choice to give a first-time shooter a machinegun (in the article they both call it a machinegun and semiautomatic, which is contradictory, but they make it sound like it had a 3-round burst, which if true would make it a machinegun, not semiautomatic), because that's like putting a first-time driver in a supercar; it's dangerous and non-representative of 99.9% of cars and driving. Of course you would walk away frightened/intimidated by it.~~
As pointed out by another commenter, they were handling a semiauto AR-15, not a machinegun as they stated.