1) Regarding the gov't taking down servers publishing hashes it doesn't like, yes that's exactly what I said they'd have to do, if you go back and re-read my prior post. Glad you agree. But like BitTorrent or Bitcoin, they'd have to basically shut off the whole internet to disable it. Not gonna happen.
2) Regarding chunking in IPFS, the fact that files are chunked actually increases the burden on any authority attempting to implement a blacklist of hashes, and so that's in agreement with my points.
Also if someone truly wants to fight censorship you'd just symmetric encrypt the data using a publicly available key so that it DOES change all hashes of ALL chunks every time you encrypt with a different key.
And encrypting the same data under many different keys (creating different copies of whole file, is also my proposed solution to the problem of "Proof of Replication" in the IPFS system.)