I would say he was quite vigorously defended by liberals. Since the 1970s there pretty much hasn't been such a thing as the left, especially in Rushdie's hayday of the 80s-00s. If there was, I doubt it would've spent much time worrying about the fate of a bourgeoisie fantasist.
Nothing against Rushdie btw. I loved the Satanic Verses. But institutional journalism (which provides the fundamental model most people use to understand Anglo politics) has conflated the terms left and liberal. And while I respect the drift of language as natural and intrinsic to culture, this misplacement has created a silly situation in which hypocracy, action and in-action are misattributed. Because these are two groups (overlapping in some cases) but distinct in a fundamental way.
In fact, I would say articles such as this are entirely flawed in that they don't grasp this distinction because they take institutional journalism's political narrative way past its power to describe reality.
Edit: BTW, this affects conservatives and "the Right" as well. Most of the people that rise to the top of the Rupblican and Tory parties are effectively "liberal". Most would not abolish civil liberties, equality before the law, etc. Just about everyone elected to government in both the UK and the US in all parties sit on a spectrum of liberalism. Mostly they just disagree about what year the government needed to stop doing things to create a "liberal" society.