Because Madonna's comment wasn't just shade, it was offensive. She was implying that cross-dressing (something very prevalent in the gay community) is bad. Given that half her fans are gay and the hydrangea comments last year I can effectively say she doesn't give two ***** about her fans.
****. That. ********. Quit acting like Madonna hasn't been acting as equally akin to an insipid child this week, including tonight. I'm sure you are so very eager to pin this on a stanbase you happen to dislike, but it's making you come off just as unbearably, obscenely and petulantly as a kindergartener blaming all of his problems on the Evil Other Team.