More details on the arrest from the original poster:

Sheikh Khalid spoke about the virtues of ribat and remaining steadfast in the blessed land. He also referenced the ongoing Palestinian olive harvest, and insults from personalities against the noble name of Sayyiduna Rasulullah salallahu alayhi wa sallam.

After questioning, Sheikh Khalid has been released, but with risk of being banned from Al-Aqsa for a period of time.

Arrests of Khatibs of Masjid al-Aqsa by the Jewish Occupation immediately after Jummuah have become increasingly common lately, as the Occupier seeks to police Islamic rituals and content in the Masjid and irreparably alter its status Quo.