There has been much to amuse in the Labor Right's attack on the Greens over the last week, culminating in a flurry of attacks over the weekend: Paul Howes lambasting the Greens for advocating such pastimes as dancing over competitive sports for kids, thereby presumably at a stroke alienating the entire ballroom dancing competition community; John Robertson (remember him?) joining in, apparently forgetting the Greens were more diligent in supporting his head-in-the-sand stance on electricity privatisation than most of his own party; the febrile comparison by Sam Dastyari -- general secretary of that politically deft outfit, NSW Labor -- to One Nation.

The participation of union leaders like Howes and Tony Maher, who joined in on Twitter, was intriguing, given the Greens are far more protectionist than the parliamentary wing of Howes and Maher. In April, for example, the Greens not merely supported the government handing out yet more wasteful assistance to the automotive industry, but wanted to explore ways to prevent a future Coalition government from removing it. For a leader like Howes, who prides himself on advocating measures to protect jobs, having a crack at the Greens looked a little perverse.