This is a severe case of compound bad reporting.
This Catholic bashing article calls the Pope “infallible”, as though the term is supposed to mean he can’t make a math or spelling error.
The original article also mischaracterized the Pope’s words and meaning, which is why the follow-up explanation was provided.
The Pope’s ordinal statement, while accurate, was also not presented “Ex-Cathedra”, which is the nature of an “infallible statement”.
On atheists:
“If anyone denies the one true God, creator and lord of things visible and invisible: let him be anathema.” - Vatican I
Therefore, atheists are automatically excommunicated unless Francis is changing this.
“This true Catholic faith, outside of which none can be saved, which I now freely profess and truly hold, is what I shall steadfastly maintain and confess, by the help of God, in all its completeness and purity until my dying breath, and I shall do my best to ensure [2] that all others do the same. This is what I, the same Pius, promise, vow and swear. So help me God and these holy gospels of God.” - Vatican I
I guess this means atheists and Protestants are going to Hell.