You must take into account 1984 riots was not the start of the trouble as also in Punjab many Hindus were killed by Sikh groups and vice versa, im not washing my hands but I believe it was the Congress party that was to blame for the majority of the problems.
Sikh majority Punjab state created (India split Punjab into three states (Punjab, Haryana and Himachal Pardesh)
[2]
1971
Jagjit singh in Pakistan and USA
March 1972
Akalis routed in Punjab elections, Congress wins
October 17, 1973
Akalis demand autonomy and more lands
[3]
April 25, 1980
Baba Gurbachan Singh of Sant Nirankari sect murdered
[4]
June 2, 1980
Akalis lose election in Punjab
[5]
Aug 16, 1981
Militants in Golden Temple meet foreign correspndents
[6]
Sept 9, 1981
Jagat Narain, Editor, Hind Samachar group murdered
[7]
Sept 29, 1981
Separatists Hijack Indian Jetliner to Pakistan
[8]
Feb 11, 1982
US gives Visa to Jagjit Singh Chauhan
[9]
April 26, 1982
Cows' heads thrown in Hindu temple
[10], [11]
Apr 11, 1982
USA Khalistani G.S. Dhillon Barred From India
[12]
July 1982
Chief Minister Darbara Singh escape assassination attempt
[13]
Aug 4, 1982
Akalis demand autonomy and additional regions for Punjab
[14]
Oct 11, 1982
Militants attack parliament
[15]
Nov 1982
Longowal threatens to disrupt Asian Games
[16]
Oct 1983
6 Hindu bus passengers killed
[17]
Feb 27, 1983
Sikhs permitted to carry daggers in demestic flights
[18]
May 3 1983
Bhindranwale living in Golden Temple threatens violence
[19]
Oct 8 1983
Militants in Golden Temple kill Hindus throughout Punjab
[20]
Oct 14, 1983
Hindu festival bombed in Chandigarh
[21]
Oct 18, 1983
Hindus protest bomb attack on temple
[22]
Oct 1983
Hindus pulled off from trains and buses and killed
[23]
Oct 7 1983
Darbara Singh removed, all religious demands met
[24]
Feb 9, 1984
Hindu wedding procession bombed
[25]
Feb 14, 1984
Militants shoot and kill 5 from Golden Temple
[26]
Feb 19, 1984
Sikh-Hindu Clashes Spread in North India
Punjab insurgency - Wikipedia, the free encyclopedia