Do you think he could actually be dating her though? I feel like a lot of his rage comes from the fact that the family might be worried if it's actually worth all the hassle.
I don't think he is dating her. I think they are friends and he is upset that people were harassing her so much she had to take her business insta down just because they saw him standing 5 feet away from her. That's ridiculous.. In my opinion Taehyung has always been a ride or die type of friend, if he sees somebody messing with his friends/family he'll take action. He even yelled at his own friends when he thought they weren't being friendly enough to Jimin when Jimin transferred to his school.