Curtailment of Friday Sermon in Perak

Ustaz Nik Aziz and Ustaz Abdul Hadi, PAS Spiritual Leader and President respectively, were barred recently from giving Friday sermon (khutbah) in the Perak State Mosque in Ipoh purportedly by the Crown Prince of Perak (presumably representing the Sultan of Perak as the Head of Islamic Affairs in the state) on the ground that mosques should not be used for political purposes. Was the restriction decreed purely by the Perak Palace or was it done under political pressures from the local UMNO leaders ? It is a common practice of UMNO to exercise such restriction in states controlled by them, but Perak is now under the People's Front rule headed by a Chief Minister from PAS (Note : PAS also has her chief ministerialship in Kedah and Kelantan states respectively).
To my personal knowledge, these renowned religious scholars and leaders are not known to have abused the Friday sermons as political platforms.
If it is from the Palace, the Crown Prince must have been ill-advised in issuing the restriction which effectively segregates Islam from politics. But Islam is wholesome, it is a complete way of life. How could politics be separated from Islam ? Only the secularists like UMNO would subscribe to this notion of separation.