The study was carried out by ADR and National Election Watch (NEW) by analysing the self-sworn affidavits of all sitting MPs and MLAs, which were submitted prior to the last election they contested.
"Analysis reveals that many of our current MPs and MLAs, who are designated lawmakers have actually declared cases related to 'Hate Speech' against themselves," it said.
Though hate speech is not defined in any law in India, the term is used to mean expression which is abusive, intimidating or which incites violence, hatred or discrimination based on race, religion, region, language, caste, sexual orientation or personal convictions, it said.
"(As many as) 15 sitting Lok Sabha MPs have declared cases related to hate speech against themselves ... (of these) 10 sitting Lok Sabha MPs with declared cases related to hate speech are from the BJP," the report said.
And, among the 43 sitting MLAs with declared cases of hate speech, 17 are from the BJP, it said.
"By giving tickets to candidates who are charged with cases related to hate speech, political parties have been in a way abetting circumstances that lead to events such as communal riots and violence between different groups of people," ADR said.
The other five MPs with declared cases of hate speech are one each from All India United Democratic Front, Telangana Rashtra Samithi, PMK, the AIMIM and the Shiv Sena.
The offenders among the MPs include two political party leaders, Asaduddin Owaisi (AIMIM) and Badruddin Ajmal (AIUDF), and Union Minister Uma Bharti of the BJP.
State-wise, Uttar Pradesh accounts for 15 MPs/MLAs with declared cases of hate speech, Telangana 13, Karnataka and Maharashtra five each, Bihar four and Andhra Pradesh three, along with nine other states with two or one cases each.
"Internet is an important tool for disseminating information and opinions however, it also serves as a platform for disseminating unlawful speech. Political parties have been misusing the medium for unlawful statements," said the report.
ADR has supported some of the recommendations of the Law Commission Report including amending the model code of conduct to prohibit any kind of hate speech by a candidate or his agent to improve the prospect of the candidate or to hurt the rival candidate's chances.
It also suggested amendments to the Indian Penal Code and Criminal Procedure Code by adding new provisions on 'Prohibiting incitement to hatred'. ADR recommended that unlawful statements on online platforms should be monitored and if the person found guilty, they should be penalised.
"ADR believes that strict action must be taken against the candidates giving hate speech prior and during the elections, and against the elected legislators even after the elections, if found guilty of indulging in 'Hate Speech'," the report said.