Congress questioned Prime Minister Narendra Modi's visit to Karpoori Thakur's ancestral village, alleging that the Jan Sangh, BJP's predecessor, had previously opposed Thakur's government over OBC reservations. The party also criticized Modi's stance on caste census and the protection of Bihar's reservation laws.
source https://timesofindia.indiatimes.com/india/sangh-brought-down-karpoori-govt-says-congress-jairam-ramesh/articleshow/124796976.cms
source https://timesofindia.indiatimes.com/india/sangh-brought-down-karpoori-govt-says-congress-jairam-ramesh/articleshow/124796976.cms