Alan Dershowitz, who previously served as President Donald Trump’s lawyer during his first impeachment trial, appeared to be captured on video in New York City Tuesday night threatening to sue a passerby for pressing him on his ties to Jeffrey Epstein.In the video, which as of 7:30 a.m. Wednesday had been viewed nearly 900,000 times, Dershowitz could be seen promoting his book “The Ten Big Anti-Israel Lies” on the night of the Democratic primary…