I had not seen your second post when I made that comment. This documents the destruction of Muhua Dabar in 1857 in the report of a British soldier who survived the beheading of the six British soldiers by the residents of Muhua Dabar:

Mohammad Latif Ansari, 65, had been leading a nondescript life as the owner of a tailoring establishment in Mumbai for many years. But an inexplicable force kept drawing him to a spot near his native village of Bahadurpur, about 15 km south of Basti, a town in central UP. Ansari's forefathers were weavers from Murshidabad in Bengal and had fled that province in the late 18th century to escape atrocities on Bengal's famous weavers by the British who were keen on promoting their textiles by eliminating India's native weaving industry.

Archives at the National Library in Kolkata, accessed by Open, show that the British chopped off the thumbs and hands of master weavers in Bengal, and many of them fled with their families to other parts of India. About 20 such families sought refuge from the Nawab of Oudh, who settled them at Mahua Dabar, a centre of weaving and dyeing near Basti. By the mid-19th century, Mahua Dabar had become a prosperous town of about 5,000 people. But the descendants of the refugees from Bengal could not forget the persecution that their grandfathers and great grandfathers suffered at the hands of the British, and, when an opportunity presented itself to take revenge in 1857, they killed six British army officers on 10 June that year. A little over a week later, British forces surrounded Mahua Dabar, looted it, massacred its inhabitants, demolished all structures, set them on fire and levelled them to the ground. The killings, plunder and destruction took nearly two weeks. By 3 July 1857, Mahua Dabar was no more.

This repeats the claim of the cutting of thumbs in a specific incident at a specific place with twenty specific families in the late 18th century. I have e-mailed Sudheer Birodkar, who has a cited blog on Indian history and culture, about eyewitness testimony as to the original cutting of the thumbs. As I noted previously I do believe this probably happened more than once, but it would be good to better substantiate those occurrences.  

"It is not necessary to have hope in order to persevere."