In case you'd missed it, the Lusitania was sunk in 1915, after WWI had been raging for nearly a year. The start of the war was not Wilson's fault. One does wonder how you would respond to the unrestricted submarine warfare being practiced by the Germans....
You're the guy who keeps telling me to go learn history--it's funny you have the nerve, being this ignorant. I was clearly referring to American involvement, which came after the Lusitania.
As for unrestricted submarine warfare, Woody himself forced the Germans into that action, when he issued the unbelievable declaration that the sinking of any vessel, including those of enemy nations, with a single American on board, would be deemed an act of war. The Germans decided, quite rightly, that Wilson was determined to enter the war, and they knew they could not win in that case. They immediately began unrestricted submarine warfare in hopes of bringing Britain to its knees before America entered the war. Which, of course, played into Wilson's hands.