Someone says that all Nabis are equal and that Rasulullah (sallallahu alayhi wasallam) does not have a rank higher than the other Ambiya.

Answer

The fellow who said that all the Nabis are equal and that Rasulullah (sallallahu alayhi wasallam) is not the greatest is a jaahil. This moron has rejected the following aayat of the Qur'aan: "These are the Rusul (Messengers) – We have given some of them ranks over others."

All the Ambiya are equal in their Message of the Truth, but they differ in rank and proximity to Allah Ta'ala. The moron should renew his Imaan.