Its about political power and vote share.. Abusing Ambedkar is same as openly abusing SC STs.. Of course, there is still verbal abuse of SC STs happening in rural areas.. but its much lesser than in the past..Also, most Indians including SC, ST, OBC, FC, Muslims dont give a f**k about constitution nor ambedkar.. But, in politics abuse of Ambedkar is still considered to be an abuse of SC/STs as a group.. Also, SC/STs together constitute more than 25 percent of Indian population in 2011.. would be more than 26 percent now.. as SC/ST birth rate > OBC birth rate > FC birth rate.. BJP which depends on anti muslim sentiment for consolidating Hindu votes cant afford to be anti SC/ST as well..