His work bore heavy criticism and he has been accused of anti-Semitism because he places international Jewish capital and Zionist ideology as the cause of World War II.

In that year he joined the Mexican Army, where he was a line soldier and then a corporal, but he left in 1934 when he had no chance to climb the military ranks.

[6] Borrego began his career in journalism in 1936, as a reporter of the Mexican newspaper Excélsior where he eventually was appointed editor-in-chief.

He became a Nazi sympathizer in 1937, when Borrego perceived an anti-German bias in the Mexican mass media, allegedly fostered by a lobby of pro-Western advertisers.

In 1996 Catalan police closed a bookstore managed by Spanish Neo-Nazi Pedro Varela, and confiscated a host of Nazi books and publications, including those of Salvador Borrego.