The ties of Ancient India and Persia goes way back.
Just like when Nader Shah looted Dehli.
At least they were looters, not losers like Chinese. Indians respect looters, not losers.
Nadir Shah's invasion of India - Wikipedia, the free encyclopedia
When a rumour spread that Nadir had been assassinated by a female guard at the Red Fort, some Indians attacked and killed Persian troops during the riots that broke out on the night of 21 March. Nadir, furious at the killings, retaliated by ordering his soldiers to carry out the notorious qatl-e-aam (qatl = killing mercilessly, aam = publicly, in open) of Delhi.
Almost immediately, the fully armed Persian army of occupation turned their swords and guns on to the unarmed and defenceless civilians in the city. The Persian soldiers were given full licence to do as they pleased and promised a share of the booty as the city was plundered.
...All across the city, gunshots were heard, explosions were set off, shops were looted and houses were set on fire. Clouds and plumes of fire and smoke were soon seen in every part of the city. Persian troops stood outside the burning buildings and then slaughtered the Indians as they made their way out, trying to escape from the fire, smoke and flames. Men were chased down alleyways and killed. Women were assaulted, raped and abducted, some had their breasts hacked off whilst others chose to commit suicide. Children had their bellies ripped open whilst babies were torn from their mothers' arms, swung by their ankles and had their heads smashed against walls. The cries, shrieks and screams of those being killed, chilled everyone who heard them.
In the words of the Tazkira:
"Here and there some opposition was offered, but in most places people were butchered unresistingly. The Persians laid violent hands on everything and everybody. For a long time, streets remained strewn with corpses, as the walks of a garden with dead leaves and flowers. The town was reduced to ashes."
It has been estimated that during the course of six hours in one day, 22 March 1739, something like 20,000 to 30,000 Indian men, women and children were slaughtered by the Persian troops during the massacre in the city. Exact casualty figures are uncertain, as after the massacre, the bodies of the victims were simply buried in mass burial pits or cremated in grand funeral pyres without any proper record being made of the numbers cremated or buried.
The city was sacked for several days. An enormous fine of 20 million rupees was levied on the people of Delhi. Muhammad Shah handed over the keys to the royal treasury, and lost the Peacock Throne, to Nadir Shah, which thereafter served as a symbol of Persian imperial might. Amongst a treasure trove of other fabulous jewels, Nadir also gained the Koh-i-Noor and Darya-ye Noor diamonds; they are now part of the British and Iranian Crown Jewels, respectively. Persian troops left Delhi at the beginning of May 1739. Nadir's soldiers also took with them thousands of elephants, horses and camels that were laden with the booty that they had seized.
The plunder seized from India was so rich that Nadir stopped taxation in Iran for a period of three years following his return.