With only a few weeks until Germany’s election, Elon Musk has unambiguously thrown his support behind the far-right Alternative for Germany (AfD) party. In a video address to a party rally last week, he appeared to urge Germans to “move on” from any “past guilt” related to the Holocaust. It’s good...

As Germans prepare to vote on Feb. 23, an almighty argument over whether mainstream parties should work with the anti-immigration AfD is threatening to upend politics in Europe’s most powerful demo…