Okay, but I don't think Kiriakou would explicitly admit if the US spied specifically on Israel.

I think at most we get a indirect "confession" like Andrew Bustamante gave in some podcasts like here, where he answers to the question if the US spies on the Mossad that everybody spies on everybody and than distract to the case were the US was caught spying on (it's ally) Germany: https://www.youtube.com/watch?v=mZklvHVsaT4

PS: I guess at the end you didn't spy until you were caught spying.