That makes no sense. It's sexist too. Look at it from this angle... If we didn't know anything about who Taylor Swift was and how she behaved herself, and we only knew she signs on a see thru bikini, then things would be different. Ohhh these are her $4000 panties! Save them for prosperity. But instead we have an instrument she uses to transform her intellectual prominence into music and now it's gotta trash that shit. It's evil. If she was a Republican racist piece of shit they would be taking that guitar to some altar somewhere. Ultimately it's a sexist action where they don't value her political views.
I don't think it's sexist, it's just rude and disgusting to behave like this. I don't care for death metal music, but it's be cool to see their instruments in person, not destroy them.