No one is asking for omniscience, so feel free to hang the strawman back in the barn. On the other hand, many are asking not to be left completely defenseless.
You're missing the fundamental point that we don't think the government should have this power.
The police should have to have an explainable reason, backed by some kind of evidence besides "I just feel that way" to use state power to infringe on the privacy or rights of a citizen even if that means some criminals get away with their crimes.
The potential abuses of unchecked investigative ability (and other law enforcement powers) is far, far more dangerous than a few mobsters.
I'm not missing that at all, but I am saying it's hypocritical to say "just go get a warrant, geez". If it had been that easy FBI would already being doing it.
It's easy to just mandate some social construct you'd like to achieve, but that does mean you also have to accept the consequences.
The consequences of "no foreign network intelligence" isn't to merely make it a bit more difficult for NSA to do their job, it's to completely eliminate the ability of NSA to do their job, with all of the counter-terror consequences that will entail from that.
While you may be perfectly willing to have the rest of America take on that risk, 3000 people at a time, don't act like you can have your cake and eat it too by simply offering up an alternative course of action which can never be implemented in practice.
Where have I advocated completely unfettered access? I'd be interested to see that.
My question uses the word "should", not the word "could".
Because it sounds like you are saying that the investigation of Abdi Zullah should be permitted to circumvent the courts because the courts and the protections that they rightfully confer would not permit the violation of Abdi Zullah.
It sounds like you think the 4th amendment is great under 'normal circumstances', and it sounds like you think that "terrorism" and "I've got a hunch" should be a secret password for a process that circumvents it.
If this is a misunderstanding, then I do not seem to be the only one misunderstanding you. You should work on your delivery.
For law enforcement? Yes, at least to the extent that an "unreasonable" search would be performed.
For military applications (such as, yes, counter-terrorism)? No, for the same reason we didn't get a warrant to wiretap Hitler's generals. I would still say that searches against any particular individual be supported by more than a single analyst's "hunch", or that non-individualized searches should be looking for particular things instead of just trawling what they can, if only for resource efficiency reasons.
(Many people, myself included, think that there is something wrong with how we are currently handling those situations, but search warrants for non-citizens outside of the country are obviously not the answer we are looking for there.)
Domestic terrorists? Get a warrant.
The point is, we don't want it.