Not that I like Kushner or his crazy religious beliefs, I am going to go out on a limb and say Kushner has a point. There are some leftist Neo-NAZI groups that pose as alt-right and really push their Jewish / Khazar world domination bile. They are exactly what our mockingbird media would love to smear conservatives with.
From what I’ve seen on Gab, the majority of the anti-semites on the site look like leftist trolls.