The Hundreds of Rabbonim who have not advocated for any such protests. Agudas Yisroel of America which has always had a policy against public protests. The OU which has not advocated for any such protests. R’Aharon Kotler who refused to join even the famed march on Washington to save the Jews of Europe.
And frankly I am little skeptical about whether Rav Shmuel really signed that letter.