It's not a European thing even though it sits in the Hague. Here's a hint, the "I" stands for International. The US ignores it for various reasons most importantly because it doesn't allow the death penalty which the States like to keep available.
I think the US ignores it mainly so it can't ever be charged with war crimes or crimes against humanity, both of which it engages in frequently in the process of changing regimes in other countries to cooperate with corporate wishes.
And of course also to support Israel's crimes against Palestinians.