Flyers posted by tony Scarsdale High School’s Israel Culture Club were torn down and dumped in school bathroom urinals in an ugly act of antisemitism, according to local officials and parents. The disturbing incident — which occurred in a Westchester County town that boasts one of the country’s wealthiest and highest-rated public-school systems — unfolded Friday when flyers promoting the group’s upcoming “Israelfest” were trashed in the local high school’s bathrooms as well as online. Scarsdale