I vote to give Alsace-Lorraine to the Jewish people as a homeland. The European ruling class has been spilling the blood of countless innocents over ownership that miserable little hole for centuries. We should use kindergarten rules: if they can’t share it nicely, they don’t to play with it at all.
It may have serious psychological value though. And do it often enough and you may be able to make the enemy spend time building the trench equivalent of “cope cages” instead of doing other things.