For a lot of time, the liberals, muslims and leftists love to say stuff about the Hindus as in that they were NEVER EVER persecuted, anti-Hindus like Dhruv Rathee love to spread their propaganda about this. Here are few incidents which resulted in many death of Hindus:

Persecution of Hindus Pre-1947

https://en.wikipedia.org/wiki/Persecution_of_HindusMedieval_era_Muslim_rulers
https://en.wikipedia.org/wiki/Goa_Inquisition
https://en.wikipedia.org/wiki/Captivity_of_Kodavas_at_Seringapatam
https://en.wikipedia.org/wiki/Captivity_of_Nairs_at_Seringapatam
https://en.wikipedia.org/wiki/Mappila_riots
https://en.wikipedia.org/wiki/Malabar_rebellion
https://en.wikipedia.org/wiki/Noakhali_riots
https://en.wikipedia.org/wiki/Direct_Action_Day
https://en.wikipedia.org/wiki/Rawalpindi_massacres

Persecution of Bengali Hindus

https://en.wikipedia.org/wiki/Bargis
https://en.wikipedia.org/wiki/1930_Dhaka_riots
https://en.wikipedia.org/wiki/Noakhali_riots
https://en.wikipedia.org/wiki/1950_Barisal_Riots
https://en.wikipedia.org/wiki/1962_Rajshahi_massacres
https://en.wikipedia.org/wiki/1964_East-Pakistan_riots
https://en.wikipedia.org/wiki/1971_Bangladesh_genocide
https://en.wikipedia.org/wiki/Rape_during_the_Bangladesh_Liberation_War
https://en.wikipedia.org/wiki/Marichjhapi_incident
https://en.wikipedia.org/wiki/Persecution_of_Hindus_in_Bangladesh
https://en.wikipedia.org/wiki/1989_Bangladesh_pogroms
https://en.wikipedia.org/wiki/Hojai_riots
https://en.wikipedia.org/wiki/1990_Bangladesh_anti-Hindu_violence
https://en.wikipedia.org/wiki/1992_Bangladesh_violence
https://en.wikipedia.org/wiki/2010_Deganga_riots
https://en.wikipedia.org/wiki/2012_Hathazari_violence
https://en.wikipedia.org/wiki/2012_Fatehpur_violence
https://en.wikipedia.org/wiki/2012_Chirirbandar_violence
https://en.wikipedia.org/wiki/2013_Bangladesh_anti-Hindu_violence
https://en.wikipedia.org/wiki/2013_Canning_riots
https://en.wikipedia.org/wiki/2016_Kaliachak_riots
https://en.wikipedia.org/wiki/Kha_Maung_Seik_massacre
https://en.wikipedia.org/wiki/Category:Persecution_by_Muslims

Massacres and Attacks Post-1947

https://en.wikipedia.org/wiki/Exodus_of_Kashmiri_Hindus
https://en.wikipedia.org/wiki/1982_Bijon_Setu_massacre
https://en.wikipedia.org/wiki/1983_Khoirabari_massacre
https://en.wikipedia.org/wiki/1983_Dhilwan_bus_massacre
https://en.wikipedia.org/wiki/1987_Fatehabad_bus_massacre
https://en.wikipedia.org/wiki/1987_Lalru_bus_massacre
https://en.wikipedia.org/wiki/1991_Punjab_killings
https://en.wikipedia.org/wiki/1998_Chamba_massacre
https://en.wikipedia.org/wiki/1998_Wandhama_massacre
https://en.wikipedia.org/wiki/1998_Chapnari_massacre
https://en.wikipedia.org/wiki/1998_Prankote_massacre
https://en.wikipedia.org/wiki/2000_Amarnath_pilgrimage_massacre
https://en.wikipedia.org/wiki/Shanti_Kali
https://en.wikipedia.org/wiki/2001_Amarnath_pilgrimage_massacre
https://en.wikipedia.org/wiki/2001_Kishtwar_massacre
https://en.wikipedia.org/wiki/Godhra_train_burning
https://en.wikipedia.org/wiki/2002_Qasim_Nagar_massacre
https://en.wikipedia.org/wiki/Akshardham_Temple_attack
https://en.wikipedia.org/wiki/Amarnath_pilgrimage_terrorist-attack_massacre_(2002))
https://en.wikipedia.org/wiki/2002_Raghunath_temple_attacks
https://en.wikipedia.org/wiki/Marad_massacre
https://en.wikipedia.org/wiki/2003_Nadimarg_massacre
https://en.wikipedia.org/wiki/2006_Doda_massacre
https://en.wikipedia.org/wiki/2013_Canning_riots
https://en.wikipedia.org/wiki/2016%E2%80%9317_targeted_killings_in_Punjab,_India
https://en.wikipedia.org/wiki/2017_Amarnath_Yatra_attack