The rise in anti-Semitism across Europe should be alarming to all of us, and not just for moral reasons. History shows that the mindset which embraces anti-Semitism rarely restricts its hatred to the Jewish minority.

Today’s threats against Europe’s Jewish populations are both different and more diverse than those in the past. Far-right extremism is still with us, but now represents only one slice of the problem. Radical, jihadist Islam is now the much larger threat. However, the far-left has also become a substantial source of anti-Semitism.