Berger had checked out as a Labour MP months ago, presumably to spend her time cooking this shit show up.Luciana Berger has been hounded by antisemites with no meaningful response from the party leadership. If you can shrug and say 'Fuck her' then you might be part of the problem.
There was a very reasonable and understandable anger at her behaviour from her local CLP, which a couple of antisemties bandwagoned on to.
Obviously any antisemetism should be dealt with, but being targeted by antisemites does not make you immune to legitimate criticism.