From:
http://www.collegegrading.com/
Akhil Bharatiya Vidyarthi Parishad is an all-India student organization, working in the field of education with a wider perspective of National Reconstruction. ABVP works with a faith in the collective existence of the educational community, a firm belief in constructive work and a nationalist approach, which stays above partisan politics.
India's largest student organization, the Akhil Bharatiya Vidyarthi Parishad (ABVP) with over 3,000 branches spread all over India and with a membership of nearly a million college students, has been channelising student - power into constructive work for half a century now.
The ABVP was started soon after independence with the objective of channelising students’ energies in the task of national reconstruction by a group of students and teachers who drew their inspiration from the RSS, the premier nationalist organisation of the country. Its growth process was slow and sporadic in the first few years but it picked up after Prof. Yeshwantrao Kelkar, a lecturer in Bombay, became its main organiser in 1958. He was its real architect and builder. As a consequence of singe-minded devotion of Prof. Kelkar, who passionately tried to build up this organisation till his death in 1987, the ABVP is what it is today.
It is unfortunate that the website you mentioned is sugar coating ABVP. As recently as few months ago, they have murdered a Professor in Madhya Pradesh State. Please read -
http://placidfreedom.blogspot.com/search/label/ABVP