Punjabi Hindus

Punjabi Hindus are an Indo-Aryan ethno-linguistic and religious group who are Punjabis from the Punjab region and follow Hinduism. While Punjabi Hindus are mostly found in India today, they have their roots in the wider Punjab region, a region that is split between India and Pakistan. 
In Indian state of Punjab, they makeup approximately 38.5% of the state's population and are a majority in the Doaba region. 
Presently, there is a very miniscule Punjabi Hindu community that remains in Pakistan, concentrated in cities such as Lahore. There is also large diaspora communities in many countries including in Canada, Australia, the United States, and the United Kingdom.
Punjabi Hindu community.
Prominent Indian nationalists from Punjab, such as Lala Lajpat Rai, belonged to the Punjabi Hindu community. Religious reform groups such as the Arya Samaj sect were active in propagating their message in Punjab.
During the early part of the 20th century, the Samaj and organisations inspired by it, such as Jat Pat Todak Mandal, were active in campaigning against caste discrimination. Other activities in which the Samaj engaged included campaigning for the acceptance of widow remarriage and women's education.
Ancient history.
Punjab during Mahabharata times was known as Panchanada. Punjab was part of the Indus Valley Civilization, a culture which is more than 5000 years old.
The main site in Punjab was the city of Harrapa. The Indus Valley Civilization spanned much of what is today India and Pakistan and eventually evolved into the Indo-Aryan civilization. The arrival of the Indo-Aryans led to the flourishing of the Vedic civilization along the length of the Indus River. This civilization shaped subsequent cultures in South Asia and Afghanistan. Punjab was part of the great ancient empires including the Gandhara Mahajanapadas, Achaemenids, Macedonians, Mauryas, Kushans, Guptas, Hindu Shahi, Gurjara-Pratihara and old Rajputana. Agriculture flourished and trading cities (such as Multan, Lahore, Jalandhar, and Rupnagar) grew in wealth.
Due to its location, the Punjab region came under constant attack and influence from the west and witnessed centuries of foreign invasions by the Greeks, Kushans, Scythians, Turks, Arabs, and Afghans. The city of Taxila, claimed to have been founded by Taksh the son of Bharat who was the brother of Ram. It was reputed to house the oldest university in the world, Takshashila University. One of the teachers was the great Vedic thinker and politician Chanakya. Taxila was a great centre of learning and intellectual discussion during the Maurya Empire. It is a UN World Heritage site, valued for its archaeological and religious history.
1947 Partition.
An estimated 2.7 million Punjabi Hindus migrated from West Punjab and North-West Frontier Province (present-day Pakistan) to East Punjab & Delhi (present-day India) during the Partition. 
This split the former British province of Punjab between the Dominion of India and the Dominion of Pakistan. The mostly Muslim western part of the province became Pakistan's Punjab province; the mostly Sikh and Hindu eastern part became India's East Punjab state (later divided into the new states of Punjab, Haryana and Himachal Pradesh). Many Hindus and Sikhs lived in the west, and many Muslims lived in the east, and the fears of all such minorities were so great that the Partition saw many people displaced and much intercommunal violence. Some have described the violence in Punjab as a retributive genocide. 
The newly formed governments had not anticipated, and were completely unequipped for, a two-way migration of such staggering magnitude, and massive violence and slaughter occurred on both sides of the new India-Pakistan border. Estimates of the number of deaths vary, with low estimates at 200,000 and high estimates at 2,000,000. The worst case of violence among all regions is concluded to have taken place in Punjab.
Punjabi Suba and trifurcation of Punjab.
After Partition, Sikh leaders and political parties demanded a "Punjabi Suba" (Punjabi Province) where Punjabi language written in the Sikh Gurumukhi script would be the language of the state in North India.
Although Punjabi Hindus of Ambala speak Punjabi as their first language, at the instigation of the Arya Samaj they stated Hindi as their mother tongue in the censuses of 1951 and 1961. Some areas of the erstwhile East Punjab state where Hindi, Haryanvi and Western Pahari speaking Hindus formed the majority became part of the newly created states of Haryana and Himachal Pradesh in 1966. Where as Doaba region of Punjab where Punjabi Hindus formed majority remained in Punjab. This made Punjab a Sikh-majority state in India.Today, Punjabi Hindus makeup approximately 38.5% population of present Punjab State of India.
Culture and traditions.
Hinduism in Punjab, as in many other parts of India, has adapted over time and has become a synthesis of culture and history. It centres on using Dharma to purify the soul ("Atman") and to connect with a greater "eternal energy" ("Paramātmā"). Hindus do this while acknowledging the concept of "Brahman" or "external energy", which is metaphysically believed to be the single binding energy behind the diversity that exists in the universe. In Punjab, like in many other regions of Northern India, Hindus revere ancient texts that narrate stories of deities (Devas and Devis) that had reached their highest Paramātmā. Deities in Hinduism are honoured for their roles in ancient Indian history, as they were the upholders of the principles of Dharma in the past. Hindus believe that an Ishvara (supreme) "Bhagavan" (God) manifests itself through these Devas and Devis. Major deities worshiped include Rama and Sita from the "Ramayana", Krishna and Radha from the "Mahabharata", as well as the Trimurti and Tridevi of Shiva and Parvati, Vishnu and Lakshmi, and Brahma and Sarasvati, along with other prominent deities such as Durga Mata Ji, Ganesha and Hanuman.
Though, boundaries between major sects of Hinduism are extremely fluid, however Hindus of Punjab mostly 
follow Shaktism and Vaishnavism. 
As Hindus believe that Dharma is universal and evolves with time, many Hindus also value other spiritual paths and religious traditions. They believe that any traditions that are equally able to nurture one's "Atman" should be accepted and taught. Hinduism itself encourages any being to reach their own self-realization in their own unique way either through Bhagavan or through other means of devotion and meditation.
Udasis.
Udasi is a religious sect of ascetic sadhus centred in Punjab Region. The Udasis were key interpreters of the Sikh philosophy and the custodians of important Sikh shrines until the Akali movement. They brought many converts into the Sikh fold during the 18th and the early 19th centuries. However, their religious practices border on a syncretism of Sikhism and Hinduism. When the Singh Sabha, dominated by Khalsa Sikhs, redefined the Sikh identity in the early 20th century, the Udasi mahants were expelled from the Sikh shrines. Since then, the Udasis have increasingly regarded themselves as Hindus rather than Sikhs.