“Verily! Those who believe and those who are Jews and Christians, and Sabians, whoever believes in Allâh and the Last Day and do righteous good deeds shall have their reward with their Lord, on them shall be no fear, nor shall they grieve” [2:62]
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In this ayah, it refers to anyone who believed in his messenger at the time of that messenger. This means that the Muslims of today, the Christians at the time of Jesus and the Jews at the time of Moses, peace be upon them.
However, today’s Christians and Jews are not believers.