In Australia for decades we've had laws that prevent one person from owning a majority of newspapers and TV stations in a city. It was supported by many left-w

In Australia for decades we've had laws that prevent one person from owning a majority of newspapers and TV stations in a city. It was supported by many left-wing people because it prevented Rupert Murdoch from dominating the media landscape. Now days such people defend the dominance of Twitter because it is using its power in a way that they agree with. Is that a double-standard?