This is a common trope that has had no basis in historical evidence. Aurangzeb was not the mass murderer of Hindus as nationalist Hindus would proclaim or even the murder that is portrayed by accounts written by the supporters of his brother Dara Shikoh. Instead he is in a very similar line to that of other Mughal Emperors with the exception that he was slightly more pious than the rest. This is primarily due to his personality which developed during his childhood under Shah Jahan who would be blamed for Aurangzeb's "quirks" but none the less he was no murderer.
By the time of Aurangzeb's reign he had inherited a losing war, begun under his great-great Grandfather Akbar, that was draining the wealth of the Mughal Empire in a futile attempt to conquer every different part of the Subcontinent. It is clear in contemporary accounts of the period that he did want to end the war and return back to his capital in Delhi where his power base was straining under pressure from different groups who were causing problems such as the Sikhs, Afghans, and rebellious Rajputs.
The most recent work which expands on this issue is a well researched and authoritative book titled Aurangzeb: The Life and Legacy of India's Most Controversial King by Audrey Truschke who remarks that there is enough within the primary sources to indicate that Aurangzeb followed similar lines as other Mughal emperors in that he built more temples than he destroyed and that he was employing the same number, or even greater, Hindu upper classes as his ancestors had done before. She also remarks that the main accusation comes from his actions in the Deccan against the Maharatas who at this time were his main opponents and that his actions in the south contributed to the perception that he also did the same in the north which is just not true.
Aurganzeb did not destroy any of the bridges, he held them as best as he could under a faltering empire that would wind up being subject to intense pressure soon after his death. There are no cases, at least from what I know, that point to a large dismissal of Hindu notables from his service. There is clear indications that due to his being in the south for most of his reign, he relied heavily on Hindu Rajputs to deal with the issues in Northern India and that they, in turn, did their best to deal and try to help the Mughal Empire retain their sense of stability
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