Ed Milliband and Rupert Murdoch

Is Ed taking on Rubert (not so much a bear) Murdoch by being critical about this individuals handling of the NOTW affair? I think he might be and if he is then good for him. Andrew Marr out it to him at his programme this morning that he might be seen as a left wing leader and of course Marr was simply trying to stir things up but I don't see how he could be seen as left wing if on the 30 of June he told the unions it wasn't right that they were going on strike? Have we got our understanding of concepts mixed up here??