Remember the Maine! Remember Hariri! I have no more idea who blew up the ex-Prime Minister of Lebanon than I know who or what blew up the U.S. battleship Maine in Havana's harbor in 1898. But we got into a war with Spain after the Maine blew up, and we may get into a war with Syria because Hariri got blown up.
Fortunately, look how well the Spanish-American war turned out for us. We idealistically gave Cuba its independence, and the government of Cuba hasn't been a problem for either us or its own people ever since. We didn't give the Philippines their independence, and we only had to kill 200,000 Filipinos to make that stick. And we made Puerto Rico part of the U.S., letting any Puerto Rican move here, and the South Bronx is known worldwide as a synonym for utopia.