Man, America has one helluva heritage of warmongering that begins from the top down. Just a few of our bloodiest presidents (they are also most of them liars, fascists, Christian fundamentalists, and oh yes, stupid too):
Madison — Got America involved in an unwinnable war he was not prepared for and made all kinds of blunders in its conduct. Fled the Capitol like a chickenhawk. Hated Blacks, Native Americans, and gays.
McKinley – The first Neocon? Entered into war with a foreign power for the purpose of “liberating” Cuba but soon showed his true Hegemonic colors.
Wilson — Neocon to the bone. Campaigned on a platform of peace but got us involved in an enormous war overseas for the stated purpose of “democracy” and “self-determination”. And that was some plan to win the peace, eh? A Christian fundamentalist who never stopped invoking the name of God in support of his policies. Opposed stem cell research. (I think)
FDR — Had been wanting to go to war long before we were attacked at Pearl Harbor, possibly revealing ulterior motives (oil perhaps?). Soon afterwards launched an invasion in Africa, which was not even the same country which attacked us! Spied on political opponents and abridged our rights like crazy. Tortured and detained Japanese civilians by the truckload.
Truman — A war criminal twice over. Got us involved in a war of choice on false pretexts that soon descended into quagmire. Did not listen to his generals. No timeline for withdrawal; our troops are occupiers to this day.
Lincoln — A divider, not a uniter. An American president out of touch with his people on a scale never seen since. His approval rating were so low that simply taking up the presidency was enough to make half the nation revolt! Unilaterally conducted an illegal and immoral war that resulted in casualties equaling 3% of the population. Did not adequately equip soldiers (most died of disease). Had no respect for the Constitution.