During Suhadeva's reign many foreigners, mainly Muslims, came into Kashmir. The chief amongst them was a Muslim missionary popularly known as Bulbul Shah who converted Renchana, a Tibetan prince settled as a refugee in Kashmir where he became king later. He was followed by Shah Mir who came in 1313 A. D. along with his numerous relations. Suhadeva received him well, being the son of a renowned Muslim divine, and bestowed a Jagir upon him. Lankar Chak, an adventurer, also came during Suhadeva's reign and settled in Kashmir under Suhadeva's patronage. 

Things went on thus when a terrific catastrophe swept over the country which developed a crisis of a far reaching character, sufficient to pave the path for the epoch-making changes that followed the event. Dulchu, a Tartar chief invaded Kashmir with an army of 70,000 strong. Suhadeva fled towards Kishtwar leaving his kingdom to the tender mercies of the merciless invader. Dulchu ordered a massacre. Thousands were killed, many more were sold as slaves to Tartar merchants who had accompanied him. Towns were set on fire, standing crops were destroyed and having stayed here for about eight months Dulchu took about 50,000 Brahmans with himself as slaves only to perish with all his troops and slaves while crossing Devsar pass. Dulchu went away from the country. 

How to tax, oppress, and humiliate

Thus a Muslim ruling class sprang into existence. This class also needed support, and they used various methods for the proselytisation of their faith. The simple tenets of Islam backed by official support gained many adherents from the lower castes. Only the Brahmans put a brave front, as we shall presently see. Renchana died in the year 1326 A.D. He left behind his widow Kota Rani and a minor son Haidar Shah who on account of his minority was not considered for the kingship.the famous Vijiveshwara temple which was partially damaged by Shahabud Din were destroyed and with the material of the latter a mosque was built and on its site a Khanaka which is even now known as Vijeshwar Khanaka.'' 

After having described the destruction of many temples the ruins of which even now bespeak a fully developed architectural grandeur and massiveness, Hassan further on says that "Sikandar meted out greatest oppression to the Hindus. It was notified in the city that if a Hindu does not become a Muslim, he must leave the country or be killed. As a result some of the Hindus fled away and some accepted Islam and many Brahmans consented to be killed and gave their lives. It is said that Sikandar collected by these methods about three khirwars (six mounds) of sacred threads ( from Hindu converts ) and burnt them. 

Hazrat Amir Kabir who was a witness to all this orgy of brute passion and vandalism at last advised him to desist from the slaughter of Brahmans, and told him to impose Jazia instead of death upon them. All the Hindu books of learning were collected and thrown into Dal lake and were buried beneath stones and earth." Governmental coercion, coupled with brisk proselytising activities indulged in by the Muslim preachers and also the privileged position which the fresh converts secured succeeded in bringing about a mass conversion. 

Sikandar himself was fired with a zeal to change the character of his rule into a purely Islamic administration and a considerable advance was made in this direction. He fully believed that the danger to the infant State was only from the Hindus. That danger had to be eliminated by any methods. Hence the persecution of the Hindus.