There is a blog linked in his user profile (if you click on the user name under the post). I'm presuming it's his. There are fresh posts as of today. The antisemitism goes back years. That's as far as I'm going to pursue this.
EDIT: There are aspects of the blog that may be disturbing and definitely NSFW.
― mod, Monday, 12 February 2018 00:40 (six years ago) link