The church he founded was one of the major annoyances of the latter half of the 20th century. If you're interested in the general history of Really Bad Ideas (and how they draw otherwise warm sensitive, intelligent people into their fold), you might want to look into it.
Let's just say I've considered the works of a lot cranks and crackpots, over the years - and a lot of viewpoints that, while not quite in that category, are just muddled and inflammatory and don't have a lot to offer to the discussion. Enough to develop a pretty reliable sense of "smell" as to whether a given piece of work merits further exploration beyond a few paragraphs or so.
So whether or not one thinks he should be fired for it -- his "manifesto" definitely does not pass that smell test.
That's my view. If you view his work differently, that's fine for you.