Let's remember what this discussion is actually about. The FBI isn't asking Apple to help them make a Jew list. They are asking for access to the telephone of a mass murderer.
There is no precedent being set here. The government has this ability already. If Apple doesn't comply like Lavabit, the government has the ability to set more onerous terms.
What's your point? China can already ask for the same thing, and it makes sense for the government to investigate ways to circumvent security, just like they might do with a combination safe. Crucially, the government isn't asking for the companies to build products with broken security — they are asking to circumvent already broken security.
From a legal perspective, this is no different from asking Apple to circumvent the passcode protection to extract unencrypted data off a device, which Apple has already done many times.
http://www.amazon.com/Nazi-Census-Identification-Control-Pol...
In fact, I would strongly push for anyone working with "big data" to read up on this. Just because we can, does not mean we should.
Data does not have a "use this only this way and only for good" button.