I was incorrect in thinking that the term "brown shirts" was a term which applied to all of the Nazis, instead it applied to the Sturmabteilung or SA, a notorious paramilitary organization within the German Nazi Party. Members of the Sturmabteilung wore brown shirts. See https://www.britannica.com/topic/SA-Nazi-organization. See also https://www.newsweek.com/marjorie-taylor-greene-nazi-germany-ajcongress-brown-shirts-1607540 which has an article called "Jewish Groups Blast Marjorie Taylor Greene's 'Medical Brown Shirts' COVID Jab Comparison".
The latter article says 'The "Brown shirts" refer to the Sturmabteilung or SA, a notorious paramilitary force assembled in the 1920s which targeted Jews and other groups and facilitated Adolf Hitler's rise to power.'
Regarding Representative Marjorie Taylor Greene of Georgia and her comments the Newsweek article quotes her saying "People have a choice, they don't need your medical brown shirts showing
up at their door ordering vaccinations. You can't force people to be
part of the human experiment". The article further says 'However, Eric Fingerhut, CEO of the Jewish Federations of North America (JFNA) condemned Greene's latest tweet, telling Newsweek that her "repeated use of Nazi imagery to discuss public health issues is outrageous, offensive and unacceptable."
...
"Jewish Federations are working hard to secure Jewish communities facing rising antisemitism across the country, and this kind of rhetoric only adds fuel to the fire. Greene should retract her statement and apologize," Fingerhut added.'
Regarding Greene and her comments, the article quotes Joel Rubin, executive director of the American Jewish Congress as saying "The Holocaust and Jewish suffering is not a prop for her delusional views comparing efforts to save lives through vaccines with the most heinous, systematic state-sponsored slaughter of millions of innocent victims."