The reason this question is hard to answer is because of how diverse the muslim rulers in India were. There definitely are many examples of atrocities committed by Islamic rulers, but as a whole, the treatment of Hindus varied wildly between kingdoms and even times within the same kingdoms. This subject has a lot of propaganda coming from both sides, but I will try to be as neutral as possible.

I will list some Islamic rulers that were notably cruel:

Muhammad Ghori - He was the sultan of the Ghurid dynasty from 1173 to 1202. While he is not the most violent on this list, he destroyed and looted many temples. Quoted from "The history of India, as told by its own historians":

"He then marched and encamped under the fort of Delhi. The city and its vicinity were freed from idols and idols-worship, and in the sanctuaries of the images of the Gods, mosques were raised by the worshipers of one God"

Sikandar Shah Miri - If any leader could show Islamic rule in the subcontinent at it's most cruel, it's him. He was the sultan of Kashmir from 1389 to 1413, and is widely remembered for his attempts to fully Islamize Kashmir. He had temples and their idols destroyed, banned all public displays of Hinduism (Such as wearing tilak), enforced steep taxes and even committed acts of violence against some of those who refused to convert. This earned him the name "Sikandar Butshikan", or "Sikandar Idol Breaker" From "Cambridge history of India III",

"He burned six mounds (1 mound is 37 kilos) of sacred threads worn by Hindus after massacring them (Hasan, Tarikh-i-Kashmir). He killed the Hindus who put a tilak-mark on their forehead ( Hasan, Tarikh-i-Kashmir). He burnt many of the books of the Hindus. Srivara wrote: "Sikander burnt all books the same wise as fire burns hay". Srivara also recorded: "All the scintillating works faced destruction in the same manner that lotus flowers face with the onset of frosty winter." (Srivara, Zaina Rajtarangini). Sikandar drowned many Hindus in the Dal Lake (Jonraj, Kings of Kashmir). According to some sources only eleven families of Brahmins were left in Kashmir due to Sikandar's policies. "

Those are just two examples of violence against Hindus under Islamic rule, there are many more but I think I've shown that persecution did occur, and that it was not entirely uncommon. On the other side, certain Islamic rulers, were more tolerant of Hinduism and some even supported it to an extent.

Zain ul Abidin has also been described as tolerant. He ruled Kashmir from 1420 to 1470. He was the son of the Sikander mentioned above. He abolished the jizya tax and had Sanskrit texts translated into Persian. He also attempted to get the Kashmiri Hindus that had fled the valley to come back, promising religious freedom and tolerance.

The Mughal emperor, Akbar, has a bit of a reputation for his religious tolerance. While his views on religion are often "whitewashed", it cannot be denied that he was one of the most tolerant out of the Islamic rulers. He abolished the tax against Hindus (they still paid taxes, just not the jizya), translated many Sanskrit texts (including scripture) into Persian, and generally allowed Hindus to practice freely and safely. This is not to say that Akbar's record is completely spotless, but for his time and historical context, he was tolerant.

So in conclusion, Islamic rulership in the subcontinent is a very vast subject, and the status of Hindus largely depended on the individual ruler and circumstances.

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Some suggested reading on the subject:

"Akbar: The Great Emperor of India" - Gian Carlo Calza

"The History and Culture of the Indian People: Volume 6, The Delhi Sultanate" - R.C. Majumdar

"The History and Culture of the Indian People: Volume 7: The Mughal Empire" - R.C. Majumdar

Honestly, I'd say to read the entire "The History and Culture of the Indian People" series if you're interested in Indian history beyond this one subject, too.