I feel like if any other pop girl did this Taylor wouldn't have taken it so personally. Like, if Britney did this I doubt Taylor would have written a song about it. You guys need to stop looking at things so ''black and white''. It's plausible that there was built up betrayal Taylor had felt with Katy and this one move was probably the straw that broke the camels back. I feel like Katy's intentions were pure and that she never intended to harm Taylor in anyway (honestly, I don't even think the offers came directly from Katy herself). I think Katy is just as surprised as we are that Taylor feels this way about her. Katy just has a personality where you either get her or you don't. She jokes around a lot and some people who are sensitive probably don't see it as a joke, maybe this is where Taylor feels like every time Katy speaks with her she is hearing the ''biggest insult of her life''. Long story short, I think Taylor dislikes Katy for other reasons (most likely about John) but doesn't want to admit it because she feels like people will ridicule her for being upset over an ex (yet again) so she's just using any excuse to write a diss track about Katy. As for Katy, if she wanted to sabotage Taylor's career she would do WAY more than steal 3 dancers away from her

I mean who goes to a Taylor Swift show to check out the dancing? Maybe there are more underground secrets we don't know about but from my impression, it seems like Taylor has disliked Katy for years and that the ''dancer situation'' probably pushed her over the edge.