In this Wednesday, Oct. 31, 2018, file photo, Jonathan Greenblatt, CEO and national director of the Anti-Defamation League, places a stone on the Star of David for Dr. Jerry Rabinowitz at Tree of Life synagogue in Pittsburgh. Greenblatt flew in for the funerals of victims of the fatal mass shooting at the synagogue. “It’s clear we must remain vigilant in working to counter the threat of violent anti-Semitism and denounce it in all forms, wherever the source and regardless of the political affiliation of its proponents,” said Greenblatt. (AP Photo/Allen G. Breed, File)
This Wednesday, Oct. 31, 2018, file photo, shows a painted rock found as part of a makeshift memorial outside the Tree of Life Synagogue in the Squirrel Hill neighborhood of Pittsburgh, in honor of the people killed during worship services several days earlier. A Jewish civil rights group says anti-Semitic attacks in the U.S. remained near a record-high level in 2018, partially fueled by a sharp increase in physical assaults. (AP Photo/Gene J. Puskar, File)
Violent attacks against the Jewish community in the United States doubled last year, while overall attacks that also include vandalism and harassment remained near record-high levels, the Anti-Defamation League reported Tuesday.