While addressing a rally at Ambedkar Nagar in Uttar Pradesh on Thursday, Bahujan Samaj Party supremo Mayawati reportedly attacked BJP chief Amit Shah saying, “The entire nation know that there is no bigger Kasab i.e., terrorist than Amit Shah.” Amit Shah had earlier triggered controversy when he devised KASAB as an acronym for describing Congress, Samajwadi Party and Bahujan Samaj Party.