I think a lot of people are seeing "cyanide" and in their minds, it conjures up images of the Holocaust and rat poison, but they don't realize that there are hundreds of industrial reactions catalyzed by the SCN- group. Having 7 lbs of cyanide is nothing, and even reasonable.
This is what you get when you have journalists have little or no technical training.
I don't think it is the amount of "cyanide" that was found nor is it the form it was found in.
I think the problem is who has the "cyanide." Zarqawi is not reasonable... his motives are not reasonable...therefore, his purpose for having the cynide is not reasonable... but threatening.