You're 100% right, but I think the friendship should be more important.

I've had friends keep things that I lent them, but that didn't ruin the friendship.

I've had friends say mean things, but that didn't ruin the friendship.

I've even gotten into a fist fight with one, but tempers calmed and the friendship endured. (I mean, the US fought two wars against England)

It's important to know who your friends are, and the knowledge that Europe is not a friend, is worth more to me than Greenland.