Apparently someone (it may have been Mark Kellner) set them straight, and the online edition has been edited thusly:
At the same time, he tithed to the Worldwide Church of God, a fringe church he had become involved with beginning in the early 1960s. The church followed Hebrew dietary laws and Sabbath proscriptions and believed in the imminent return of Jesus Christ. For a time, Mr. Fischer lived in Pasadena, Calif., the church’s home base, or nearby Los Angeles, where he was said to spend his time replaying chess games and reading Nazi literature. There were reports that he was destitute, though the state of Mr. Fischer’s finances was never very clear.
So it seems WCG has been de-defuncted. That must be a relief for the lads in Glendora, though the way the article is written still gives the impression that church members keep a copy of Mein Kampf beside their Bibles.
Addendum: Pasadena Star News columnist Larry Wilson now leaps into the act with an article that tries to clarify Fischer's WCG connection. Here's an excerpt:
I know that some Pasadenans don't like to hear it, because the concerts in the auditorium of Ambassador College on the church's fancy West Pasadena campus were so fine and high-culture and whatnot. But it was all a charade - the Armstrongs didn't give a damn about culture. They just wanted what had been known as the Radio Church of God to be accepted in what they thought of as their snooty new hometown. But growing up around the church in Pasadena, with its neurotically manicured dichondra lawns - weeding labor courtesy of the automatons in white shirts and dark ties or little twinsets who pretended to be college students - the place always gave me the Stepford creeps.
Ouch! But Wilson doesn't do his credibility any favors by sloppy research, for example he names Herb's son Gardner Ted.