@alex @Humpleupagus @matty @pasture @graf @mint /cow/ is a very long running lolcow imageboard which is the primary competitor of Kiwi Farms (which came about later). Generally speaking, /cow/ and Kiwi have extremely hostile attitudes to each other and this extends to properties which can be seen to be "affiliated" with one or the other. My best guess is that someone who was a /cow/ regular held a grudge against chudbere because of her site essentially being Kiwi/eceleb central and decided to compromise everything for lulz and to send a message. To answer your last question, no, these people don't care about the fediverse as a whole, it's just internecine community drama that they pursue for the hell of it.