If you bothered to read any of the material at the link I provided, you'd soon see just how wrong you are. There is substantial evidence, not only that Roosevelt knew Kido Butai's every move as the Japanese carrier strike force approached Pearl, but also that he had implemented a series of measures, primarily economic, which were specifically designed to back Japan into a corner so that a strike on Pearl would be a likely move by the militants then in charge of Japanese affairs.

...Lieutenant Commander Arthur McCollum, a U.S. Naval officer in the Office of Naval Intelligence (ONI), saw an opportunity to counter the U.S. isolationist movement by provoking Japan into a state of war with the U.S., triggering the mutual assistance provisions of the Tripartite Pact, and bringing America into World War II.

Memorialized in McCollum’s secret memo dated October 7, 1940, and recently obtained through the Freedom of Information Act, the ONI proposal called for eight provocations aimed at Japan. Its centerpiece was keeping the might of the U.S. Fleet based in the Territory of Hawaii as a lure for a Japanese attack.

President Roosevelt acted swiftly. The very next day, October 8, 1940, the Commander-in-Chief of the U.S. Fleet, Admiral James O. Richardson, was summoned to the Oval Office and told of the provocative plan by the President. In a heated argument with FDR, the admiral objected to placing his sailors and ships in harm’s way. Richardson was then fired and in his place FDR selected an obscure naval officer, Rear Admiral Husband E. Kimmel, to command the fleet in Hawaii. Kimmel was promoted to a four-star admiral and took command on February 1, 1941. In a related appointment, Walter Short was promoted from Major General to a three-star Lieutenant General and given command of U.S. Army troops in Hawaii.

Throughout 1941, FDR implemented the remaining seven provocations. He then gauged Japanese reaction through intercepted and decoded communications intelligence originated by Japan’s diplomatic and military leaders.

The island nation’s militarists used the provocations to seize control of Japan and organized their military forces for war against the U.S., Great Britain, and the Netherlands. The centerpiece—the Pearl Harbor attack—was leaked to the U.S. in January 1941. During the next 11 months, the White House followed the Japanese war plans through the intercepted and decoded diplomatic and military communications intelligence.

Japanese leaders failed in basic security precautions. At least 1,000 Japanese military and diplomatic radio messages per day were intercepted by monitoring stations operated by the U.S. and her Allies, and the message contents were summarized for the White House. The intercept summaries were clear: Pearl Harbor would be attacked on December 7, 1941, by Japanese forces advancing through the Central and North Pacific Oceans. On November 27 and 28, 1941, Admiral Kimmel and General Short were ordered to remain in a defensive posture for “the United States desires that Japan commit the first overt act.” The order came directly from President Roosevelt.

Source

Unfortunately, WWII is not the only conflict in which deceit was used to garner public support for war. As a guide to your education, I've linked to an excerpt from a a speech delivered in 1933, by Major General Smedley Butler, USMC.

War is just a racket. A racket is best described, I believe, as something that is not what it seems to the majority of people. Only a small inside group knows what it is about. It is conducted for the benefit of the very few at the expense of the masses.

Fortunately, "...you can't fool all of the people all of the time."

Peace,
S