A 34-year-old man who reportedly had a cache of guns and a Nazi flag in his home has been arrested after allegedly posting threats to rape Jewish women and inciting others to shoot people outside synagogues. Beverly man Matthew Scouras, who was busted following a tip from the feds, is accused of making “frightening and disturbing threats targeting the Jewish community.” The FBI National Threat Operations Center last week alerted Beverly Police about a resident posting several…