The hotel heiress, who was raised a Roman Catholic, and her father Rick have both been targeted by a guy on Instagram and Facebook who has posted several abusive and anti-Semitic messages to the pair, repoerted TMZ.
The guy is also alleged to have threatened to sexually assault the 33-year-old star.
The Los Angeles Police Department has obtained a warrant to try to track down the man on the social media sites and believe they know who he is.