Fair view. Pearl Harbor was a naval base and US should know better to be on guard since they blockaded Japanese shipping lines. As for Hiroshima and Nagasaki, I think that US should be accorded some credit for humane benevolence and strategic prudence. It could easily have been Tokyo and Osaka. US objective wasn't to destroy or conquer Japan, just to subdue it completely. At war, calculated sacrifices have to be made. Enough to make Japan surrender unconditionally, but not too much as to create another mass of chaos that couldn't be cleaned up.
Pearl Harbor was the mother of all conspiracies. I wouldn't disagree with that viewpoint. George Marshall role in it was just unfathomable as claimed by Joseph McCarthy.
It was US diplomatic failure to successfully negotiate with Japan a conditional or unconditional surrender. Japan knew the war was lost, they were going to surrender as shown by the appointment of pro US Kantaro Suzuki as Japan Premier in April 1945. What US needed back then were more skilled diplomats and negotiators to solve the surrender deadlock instead of using the A Bombs. as to why US diplomacy efforts failed, that's another story involving the Russians, Chinese and the big prize Manchuria.