Salafis say that 20 raka‟ts Taraaweeh was not the practice of Rasulullah (Sallallahu alayhi wasallam).

Answer

Assuming that Rasulullah (Sallallahu alayhi wasallam) did not perform 20 raka'ts Taraaweeh, then too 20 raka'ts remain Sunnatul Muakkadah. This has been the practice from the time of the Sahaabah who had greater knowledge of the practice of our Nabi (Sallallahu alayhi wasallam) than all of the Salafis and their Imaams lumped together. Rasulullah (Sallallahu alayhi wasallam) had equated the Sunnah of his Khulafa-e- Raashideen to his own Sunnah. Obedience to the Sahaabah is thus Waajib. The Ijma' of the Ummah from the era of the Sahaabah is on 20 raka'ts.

Hadhrat Ibn Abbaas (Radhiyallahu anhu) has explicitly narrated that Rasulullah (Sallallahu alayhi wasallam) had performed 20 raka'ts. So confound the stupidity disgorged by the deviate Salafis.