Therefore being able to call people Jew haters is official Mudcat policy. Right, Keith?

No Steve.
Anyone can post to Mudcat. It is an open forum.
You have to be accredited by EU to publish stuff on their pages.

The "WORKING DEFINITION OF ANTISEMITISM" is published on the site of the "European Parliament Working Group On Anti Semitism."

It says "The purpose of this document is to provide a practical guide for identifying incidents, collecting data, and supporting the implementation and enforcement of legislation dealing with antisemitism."
http://www.antisem.eu/projects/eumc-working-definition-of-antisemitism/

There is no suggestion that it is not in force or not recognised by anyone.