I can certainly understand how someone more committed to a traditional religious worldview would find his writing style brazen at best, and arrogant or obnoxious at worst. He is challenging basic assumptions, and some people find that threatening. I found his descriptions of the self-deception of American Jewry and the state ambivalence many Jews feel about their religion as a result to be quite on the mark. Similarly, I think he'd favor any group of jews forming any kind of congregation they collectively would like to. So for example, if you would only understand the meaning of wrapping tefillin, you would certainly begin to do so.
Wine draws a different conclusion.
Since he views the problem differently than religious people do, his prescription is different. The Temple and Sacrifices I would like to make some comments on the Temple and sacrifices. At least some of them are even held by many Orthodox. They are quite limited in number, and the one Temple seems to be for the purpose of making sacrifices more difficult. Except for the free-will offering, all had to be for a specific purpose.