In brief: Hermann Dierkes, decent left-wing German politician with long history of anti-racism. Calls for a boycott of Israel and all hell breaks loose with accusations of antisemitism from the right and the left. When it comes to Israel, Germany seems closer to the US than Europe - the same hysteria and attempts to scream down dissent.
There's more information about the case here , and an online petition with several hundred (mainly European) Jewish signatories, that folks can sign here.
go on go on go on go on go on.