From Taylor's Rolling Stone interview:
The angriest song on 1989 is called "Bad Blood," and it's about another female artist Swift declines to name. "For years, I was never sure if we were friends or not. She would come up to me at awards shows and say something and walk away, and I would think, 'Are we friends, or did she just give me the harshest insult of my life?'" Swift, 24, told the mag. "[Then last year] she did something so horrible. I was like, 'Oh, we're just straight-up enemies.' And it wasn't even about a guy!"
She continued, being careful not to name names. "It had to do with business," Swift hinted. "She basically tried to sabotage an entire arena tour. She tried to hire a bunch of people out from under me. And I'm surprisingly non-confrontational — you would not believe how much I hate conflict. So now I have to avoid her. It's awkward, and I don't like it."
Again, that's from Taylor herself.
Now, Taylor doesn't name names, but lets look at the facts:
Taylor's enemy is a female artist.
Taylor's enemy was her friend once, but no longer.
Taylor's enemy tried to hire a bunch of people out from under her.
Taylor and her enemy now avoid each other.
Those are all facts from Taylor herself.
Now, it's well-known that during Taylor's RED Tour, a number of dancers who danced for Taylor left her and went to work on Katy's tour instead. That right there is the smoking gun.
This is obviously about Katy.
Sorry, but you seemed very biased, and have nothing other than "It's not about Katy because I don't think it's about Katy" to back up your opinion.
Taylor's tour dancers left Taylor to work with Katy. Fact. A fact which matches perfectly with the comments coming straight from Taylor herself.
BTW, Taylor and Katy, when they were friends, used to be photographed together all the time. I can produce multiple pics of Taylor and Katy together...from years ago.
No such pics exist of Katy and Taylor together since Taylor's RED Tour. Even though Taylor is constantly photographed with dozens upon dozens of famous female friends all the time now.
But no Katy at all, not anymore. Gee, I wonder why that is?