I am familiar with the author, he's a drama queen, but he's not incorrect there is a huge wave of antisemitism in the world. It's a daily battle. Ben Shapiro got a lot of racial abuse too, but its just part of living in a world with free speech.
Most antisemitism comes not from Nazi sympathizing identitarians, but Muslim extremists. It's a real problem in Europe, and it's good to discuss.
I really reject trying to delegitimize Trump supporters by throwing them all in with the alt-right. As a Jewish Kekistani, it infuriates me. I don't like identitarians, but they have a right to their views. I want everyone to be very clear on what terrible views they have so they don't get power. This sort of schlock in the NYT just makes things convoluted and people less likely to be able to discern who is friend, and who is foe.