Was Shearer set up?

This is unbelievable. 3 News reports:

If David Shearer didn’t jump he was probably going to be rolled – that much, we already know.

But now it’s emerged that it wasn’t just a small faction inside the Labour Party that wanted him gone – it was his entire caucus.

In fact, every single one of them knew Mr Shearer was going to present two dead fish in Parliament last week, and no one stopped him.

They all knew? Not one Labour MP said that it was a massively bad idea? The poor bastard. They set him up. No wonder he is taking a few weeks off.

Whose idea was it? Will we find out?