The US *is* responsible for the Pearl Harbor attack, but for a different reason. There were 9 official inquiries between 1941 and 1946 and a tenth in 1995:
“The inquiries reported incompetence, underestimation, and misapprehension of Japanese capabilities and intentions; problems resulting from excessive secrecy about cryptography; division of responsibility between Army and Navy (and lack of consultation between them); and lack of adequate manpower for intelligence (analysis, collection, processing)”
So we can feel comforted that nothing like this could ever happen nowadays...
Yep, and those inquiries were designed to crucify the commanders on site at Pearl, while those who denied them access to our best intelligence got medals and promotions.
I presume you meant US failures were largely responsible for the great success of the attack, not for it's being launched.