The Vishwa Hindu Parishad (VHP, World Council of Hindus), founded in 1964, is the main religious front of the Sangh Parivar. Its mission is to construct a simplified and unified Hindu identity, towards the Hindutva goal of reconstructing India as a Hindu nation. The VHP has a history of involvement in communal mobilisation and violence, including the destruction of the Babri Mosque in 1992, and the pogrom in Gujarat, 2002.
VHP "cultural" activities have included vandalising art galleries displaying the work of Pakistani artists, attacking couples celebrating Valentine's day, and a successful campaign to get a scholarly book on Hinduism withdrawn from circulation in India by its publisher (Penguin). The VHP has front organisations abroad, including in the UK and USA. These play a major part in raising funds for the Hindutva project (pdf).
References:
• Vishva Hindu Parishad and Indian Politics, by Manjari Katju.
• Profile of the VHP by the BBC.
• Profile of VHP (USA).