I have heard this in the past, that on Judgement day Allah swt will allow a group from all three monotheistic religions to enter Junnah but I am not sure if this is correct.
The followers of all prophets during their period of prophethood will enter
Jannah. Upon prophethood of Muhammad (Sallallaahu Alayhi Wasallam), the
prophethood of every other prophet has terminated, Rasulullah (Sallallaahu
Alayhi Wasallam) said, ‘Were Musa (Alayhis salaam) alive, he would have to
follow me.’ (Mishkaa). After the advent of Nabi (Sallallaahu Alayhi
Wasallam), only those who have followed him will enter Jannah.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai
FATWA DEPT.