City Council Speaker Julie Menin introduced legislation Thursday to create an up to 100-foot buffer zone for protests outside synagogues and other houses of worship. The new proposed bill from the city’s first Jewish council speaker would allow the NYPD to establish a security perimeter of maximum 100 feet around religious institutions during demonstrations, to be determined on a case-by-case basis.  “Jewish New Yorkers make up roughly 10 percent of our city’s population yet last year they were