And there are among them illiterates, who know not the Book, but (see therein their own) desires, and they do nothing but conjecture.
The following excerpt is taken from “Anwar ul Bayan” vol 1 pg. 80:
Allah speaks of the ignorant masses amongst the Jews who could neither read nor understand the Torah. The only knowledge that they had was that they would certainly enter Heaven (Jannah) and, if they should enter Hell, it would be for a few days only. They prided themselves for being the chosen and beloved slaves of Allah because they were descendants of the Prophets (Anbiya) (peace be upon them).
These were some of the false hopes and expectations that they entertained. They believed that their sins and falsification of the Holy Prophet (peace and blessings of Allah be upon him) would not present an obstacle to this exalted position that they fashioned for themselves.
Madani, Muhammad. Anwar ul Bayan. (vol. 1 p. 80). http://www.islamicweblibrary.com/wp-content/uploads/2020/04/Tafsir-Anwarul-Bayan-02.pdf