Fighting the unbelievers and treating them harshly is one of the requirements of religion. - Ahmad Sirhindi

Every person cherishes some longing in his heart. The only longing which this recluse (meaning himself) cherishes is that the enemies of Allah and his Prophet should be roughed up. The accursed ones should be humiliated, and their false gods disgraced and defiled. I know that Allah likes and loves no other act more than this. That is why I have been encouraging you again and again to act in this way. Now that you have yourself arrived at that place, and have been appointed to defile and insult that dirty spot and its inhabitants, I feel grateful for this grace (from Allah). There are many who go to this place for pilgrimage. Allah in his kindness has not inflicted this punishment on us. After giving thanks to Allah, you should do your best to ruin that place and their false gods… whether the idols are carved or uncarved. Let us hope that you will not act slow. Physical weakness and severity of the cold weather, comes in my way. Otherwise, I would have presented myself, and helped you in doing the job. I would have liked to participate in the ceremony and mutilate the stones…

The original aim of taking the jizya from [unbelievers] is for their degradation and this degradation [ought to be] to the extent that they cannot wear nice clothing for fear of the jizya ... and that they are always fearful and trembling ....

The Shariat prevails under the shadow of the sword (al Shara‘ tahat al-saif) - according to this (saying), the Shariat can triumph only with the help of mighty kings and their good administration. But for some time past this saying has been languishing, which means inevitably that Islam has become weak. The unbelievers (Hindus) of Hindustan are demolishing mosques, and erecting their own places of worship on the same sites. There was a mosque in the tank of Kurukhet (Kurukshetra) at Thanesar, as also the tomb of some (Muslim) saint. These have been demolished, and a huge gurudwara has been constructed on the same sites. Besides, the kafirs are holding many celebrations of kufr…
It is a thousand pities that the reigning king is a Mussalman, and we recluses find ourselves helpless. There was a time when Islam stood glorified due to the might and prestige of its kings, and the Ulama and the Sufis were honoured and held in high regard. It was with their help that the kings made the Shariat prevail. I have heard that one day Amir Taimur was passing through the bazar at Bukhara when, by chance, the inmates of Khwaja Naqshbandi’s khanqah were beating the dust out of the mats used in that place. Because Islam was intact in Amir Taimur, he stopped at that spot and regarded the dust of the khanqah as musk and sandal. He met a good end.