America, he rightly says, “has always been a blessing to its Jews.” All the more shocking then is the hatred on college campuses, crowds chanting for the death of Israel, and excusing or cheering the murder of Jewish babies and their mothers.

And he offers an idea for how America’s non-Jews could do something powerful for America’s Jews, with little, though perhaps more than zero, risk to themselves.

Take the Spartacus choice. Put a mezuzah on the doorposts of your homes and apartments, a sign that “we are all Jews.”