JWs hate anything they can't control and doesn't fit into their mold. As someone else said, fear also has a lot to do with it.
As far as one group feeling more hate than the other, my opinion would be that it depends on your personal situation and outlook. After reading hundreds of stories on this board for (I think) over a year now, it seems like there has been A LOT of pretty nasty treatment, regardless of being DFd, DAd or Faded. Not only that, but one person might take it to heart more than the other, depending on their expectations. When youre DFd, you EXPECT to be treated like crap, wheras if you're faded, you might still carry the hope that you'll be treated with respect. Makes it a little more shocking when you're treated with their version of "Christian Love".
JW's can't even love each other, much less a common "enemy", no matter what the situation.