The Libertarian party does not support the Iraq war. At least 70% of Americans are against the war. I can't imagine that anyone who is truly informed could be in favor of the Iraq war. For that matter, he's not anti war. He's anti-unjust, undeclared, pre-emptive war.
Here is a press release from the Libertarian party yesterday.
http://www.lp.org/media/article_545.shtml
Apparently the Libertarian party doesn't share your views.