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 government can get a warrant for collecting all of the data they currently want access to. Pretending the government doesn't already have the tools needed to enforce the law is disingenuous. Pretending that this bill is a "reasonable" response to real problems is disingenuous.
It isn't a debate between calm, rational, reasonable people who think the bill is fine (with maybe a tweak or two) on one side, and nutjobs who are paranoid and think like Gene Hackman in The Conversation on the other. There are reasonable people on both sides...but, I question the intentions (and possibly the integrity) of people, particularly people in the tech industry, who support the bill as it stands today.
It shouldn't be surprising that so many people on HN are uncompromising on Internet freedom. It's something we know more than most about, and something we care more than most about.