mbs: I would say it was of considerable concern to those who lost family and those who nearly died! When I was very young, my parents showed me a picture book entitled "This must never happen again!" I was instructed at an early age, well before 1967. That last bit about Israel is ridiculous.
Guilt is partly political and can be inculcated to some extent. It can also set in with a lag. So the movements of the Guilt Index doesn't discount its level at any particular point, nor its foundation. But in the end I agree we have to look beyond public opinion to uncover the roots of U.S. Israeli relations.
mbs