It has hundreds of citations of Jesus splitting "from the Eastern early Christians on fundamental grounds and was prepared later to work with the Zealots to rule on a consensus basis"? Jesus split from his disciples? What does that even mean? Who are " Eastern early Christians"?
In any case, these sources are just as subject to redaction as the earlier sources.
No, the book has hundreds of citations. Some support that theory, some don't - it covers many different theories without being judgmental.
Also, the fact that the Romans did not annihilate the early Christian movement as they did several other contemporary Messianic movements speaks decisively against the idea that Jesus of Nazareth advocated the violet overthrow of the state.
That is a very good point. It wasn't unit the next generation that the Romans stomped them out.