About two-thirds of American Jews say they are less safe than at any other time in the past decade, the Anti-Defamation League said on Tuesday.
The figure was revealed in a newly released survey conducted by YouGov among 538 American Jews some two months ago.
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According to the survey, 54% of respondents said that they have experienced an anti-Semitic incident or witnessed one.
Almost half, some 49%, said they heard of others being addressed with anti-Semitic slurs or remarks, and a smaller proportion expressed concern that a person wearing a skullcap or otherwise visibly Jewish would be attacked in public, either verbally or physically.
Some 27% said they have taken concrete steps to avoid being targets of such attacks, including by disguising their Jewish identity or even changing their last name.
"Our tracking has shown that lethal and nonlethal ant-Semitic attacks have been on the rise in recent years, and now we've also found that American Jews are deeply concerned for their personal safety and their families' and communities' security in a way that they haven't been in more than a decade," ADL CEO Jonathan Greenblatt said following the release of the survey.
"It is a sad state of affairs that in the face of widespread anxiety about anti-Semitic attacks, some Jewish Americans are modifying their routines and avoiding public displays of Judaism to minimize the risk of being targeted," he added.