Maybe you should inform yourself better. Germany refused to help their so called "ally" 2003 in the Iraq war, Germany refused to help their "ally" in the Libyan war, Germany refused to support any side during the Syrian civil war. Germany is the main reason that sanctions against Russia during the Ukraine conflict were weakened to the point of irrelevance (the US actually wanted a full blockade - LOL) as the government understands that it's really the US that caused this conflict.
The only US war that Germany viewed as legitimate and thus supported was the Afghanistan war of 2001.