Original sentence: A fringe theory, the Nazi gun control argument, posits that the disarmament of the Jews helped to facilitate the rise of the Nazis and the Holocaust; fact-checkers have described this theory as "false" or "debunked"
Edited sentence: The Nazi gun control argument states that the disarmament of the Jews helped to facilitate the rise of the Nazis and the Holocaust; critics have described this argument as "false" or "debunked"