Tbf, “self defense,” while technically being “violence,” is the only time violence is actually acceptable. She should buy a gun if she’s being stalked by anyone, but of course just buying one isn’t enough. Also needed is practice to learn how to shoot (preferably with an instructor if you can afford it, but you can learn most of that stuff from the right sources online actually like Jerry Miculek’s videos on it, if that’s your only option), carry permit if your state needs it, and learning the laws regarding use of force in your area. Also buy/carry OC spray if it’s legal (for instance it isn’t legal in NYC) in case he ends up being a threat, but not a deadly threat.

Practicing nonviolence is a worthy pursuit and I’m also a proponent of it, but to go so far as to forego self defense in the name of pacifism is just foolish in my personal opinion. The advice isn’t just “shoot him next time you see him,” (that’s called murder lol), it’s “just in case he tries to kill you, be prepared with an Uno reverse card.”