Earlier quoted context omitted.
Some people oppose CISPA because of fixable issues regarding privacy or overly broad scope, some oppose it because they they think that it'll let the government spy on every URL they visit or allow the MPAA to take down all of Facebook for copyright infringement. According to the latter, CISPA isn't just a bad idea, it's pure malicious evil - the people supporting it need to be defeated so soundly that they never eve…
You make it sound as though those are the only two kind of people on this issue: Those who are reasonable and think CISPA can be fixed, and those who think CISPA is a bill to make spying on every American citizen the legal obligation of every ISP and internet company. You leave no room for the vast majority of us who believe that the US government already has more than enough authority to spy on people; the governmen…
That's the kind of problem that CISPA proponents are trying to solve with regard to "cyberspace security". It's not supposed to be another way for the government to obtain information on people or threat groups, for the exact reasons you listed. It's supposed to be a way for the private sector and government to cooperate on network defense, sharing information as necessary to provide a coordinated defense in response, investigate attackers, etc.
Government can't do it alone as the private sector controls the networks and has a lot of the needed expertise. The private sector can't do it alone as they have no legal authority, which is quite deliberately retained with the government (especially in light of what happened to Sunil Tripathi).
There are actually similar arrangements already in place in other areas. For example disaster relief/emergency management has a lot of tie-in between Federal, state, and local governments, DoD, and NGOs such as the Red Cross, all of which have pre-planned responses to various disaster scenarios. But these can be done without changes to the law, which is at least somewhat unclear in the case of coordinated network security.
Now CISPA as it currently stands is dangerous because it still doesn't provide enough privacy protection (especially on the commercial -> government direction), but please don't act like it's just another feeder source for the FBI, as if that were the only possible motive, especially given existing issues such as the Aurora attack on Google.