Is publicly shaming someone a cardinal sin (a sin which one must die rather than perform), as per the Talmudic statement that it is better to die than to publicly shame someone (Berakhot (43b), Bava Metsia (59a) Ketubot (67b), Sotah (10b))?
R. Yonah (Shaarei Tshuva: Shaar Shlishi 139) cites and explains the passage, ostensibly implying that it is halakhic, and Tosafos (Sotah 10b) hold that it is. If I understood correctly this is also the opinion of R. Ovadiah Yosef (Yabia Omer 6:13:12). What are the various opinions of poskim on the matter?