Why were the 10 Italian scientists who signed the Manifesto of Race not removed from university professorships at the fall of Fascism?

Let alone the “politicians” joined and actively participated in the Republic of Salò and in the persecution of the partisans (see Giorgio Almirante), let alone the professors! An amnesty decidedly excessive and, in my , wrong, that of Togliatti, which in the of reconciliation allowed many fascists and republicans to recycle themselves in the newly born Republic.