It’s reported that the Prophet, peace and blessings be upon him, stood with respect at a funeral procession, and upon being told that it was for a Jew, the Prophet, peace and blessings be upon him, replied: ?Isn?t he a human being??(Narrated by Bukhari and Muslim).
Answer
The incident was not at a funeral procession.
If it was at a funeral procession, then there was no need for such a
question as it would be a known fact that it is a funeral of a Jew. In fact,
it is far fetched to think that the Sahaabi (Radhiallaahu Anhu) who had a
doubt on the mere standing of Rasulullah (Sallallaahu Alayhi Wasallam) upon
seeing the Janaaza, would have been at the funeral.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai