(CNN) Vlad Khaykin directs the Anti-Defamation League's programs on anti-Semitism. For him, it's personal. He was born in the Soviet Union where Jew-hatred was entrenched in society. Khaykin's grandparents survived the Holocaust. Other family members did not. Today he is grateful -- and protective -- of the safety he enjoys. But that safety is threatened. The Anti-Defamation League (ADL) reported that anti-Semitic attacks hit an all-time high in 2019 , remained at historically high levels in 2020 and now recent incidents have the Jewish community on edge . Khaykin says hostility against Jews tends to gain ground during times of...