I don't really understand where it's all coming from but it generally seems to be from Robert and Jose fans who are freaking out that Billy might stay at one of their favorite's expense. But then there are also some crazed Billy fans who are po'd that Nigel has put Billy in the position to have to defend himself against these crazed fans. The level of civility in this country has really gone down the tubes. Nigel isn't helping by retweeting and responding.
ETA: I hadn't realized until reading his twitter feed that Jose hasn't been performing in the group numbers (they've been so bad I haven't been watching them). What's that about? He hasn't responded to people asking why.