Matsuoka Hailed In Japan 

この時の松岡は、落胆しとったんやぞ。 全力で存続協議して、多くの国は満州事変を多めに見てたのに、陸軍が熱河作戦をやり始めて...(昭和天皇も大権で止めさせようとしていた)

Fearing us then. Deciding to take the gamble in 41. Then disaster. The outcome in the Pacific was in the end never in boubt!

He spoke in English at Geneva because English and French were official languages at the League of Nations. Actually, he was selected as the delegate for this occasion, although he was not a diplomat at that time, because there weren't suitable career diplomats to speak sufficient English. Also, Matsuoka was educated at Univ of Oregon (while being enslaved by his White employer), and knew about pseudo humanism of US than most people in the world.

Siam (Thailand) abstained from the League’s condemnation in 1933 of the Japanese occupation of Manchuria.

陸軍の熱河作戦のせいな 松岡も、昭和天皇も、存続派だった

You realize the reason Japan attacked Pearl Harbor and declared war on the USA was because the USA were doing trade embargos on Japan that broke international law, and was preventing oil, food and other resources from reaching Japan, which was halting their war against communist china? Rosevelt wouldn't lift the embargos unless Japan agreed to fully leave China. Japan had several options, submit to america, and die to China, or go out fighting and declare war on USA.

メディアが世論を作った。