…At that period, there will be some summoners [propagandists] who will call people to the gates of Hell. Whoever answers the call of these summoners, they will cast him into Hell. "O Messenger, can you tell us the characteristics of this group of summoners?" The Prophet (may God bless him and grant him peace) answered: "I will answer, they are a group of people from our nation who speak our language." (Mukhtasar Tazkirah al-Qurtubi, p. 382, no. 698)

There exists a great blind and deaf fitna [that is, the kind of fitna that makes one blind from seeing the truth and deaf from hearing the just], grand evil. Within this fitna, there exist some summoners [propagandists] who call people toward the gates of Hell. (Mukhtasar Tazkirah al-Qurtubi, p. 380, no. 696)

In the near future, there will be horrible fitnas that will render one blind, deaf, and mute from seeing the truth; rendering them deaf from hearing the just words … In the turmoil of fitnas, the interference of language into the fitna and its propaganda will, like a sword blow, ensure its spread. (Mukhtasar Tazkirah al-Qurtubi, p. 390, no. 720)