Elon Musk is throwing grenades into Europe’s political mainstream over issues ranging from immigration to free speech, creating a dilemma for governments as they try to respond to the tech billionaire and key adviser to the incoming Trump administration.

In recent days and weeks, Musk has weighed in with a series of incendiary social-media posts on European politics, including supporting a far-right party ahead of an election in Germany, accusing the British prime minister of being complicit in rape, denouncing judges in Italy and slamming the European Commission.