From the Spectator article, the Lib Dems copied the International Holocaust Remembrance Alliance definition of anti-Semitism.
That is wrong for reasons that go far beyond disagreement over changes to the the GRA. I think Ed Davey should issue an apology first thing on Monday morning. The definition of anti-semitism is not a cut and paste that can be applied to any group.
"Mindful of the long-standing trope about Jewish control of the media, the IHRA gives the following as an example of anti-Semitism:
‘Making mendacious, dehumanising, demonising, or stereotypical allegations about Jews as such or the power of Jews as collective — such as, especially but not exclusively, the myth about a world Jewish conspiracy or of Jews controlling the media, economy, government or other societal institutions.’
The Lib Dems give as an example of transphobia:
‘Making mendacious, dehumanising, demonising, or stereotypical allegations about trans people or their cisgender allies. This includes spreading the idea of a “trans conspiracy” which asserts undue influence over media or government or claiming that cisgender allies support trans rights initiatives out of fear or bribery rather than a genuine belief that trans rights are human rights.’"