VHP is a purely Hind organization involved in spreading and protecting Hinduism.
RSS is a Hindu Nationalist organization built by an Atheist who defined Hindutva as a cultural and civilizational identity.
Is there a common source of funding for both VHP and RSS ???
You call it 'Sangh Parivar', so can you show how the Parivar has funded RSS ? or BJP for that matter ?
Using the same logic, All christian churches of various denomination like protestean, catholic, baptist etc.. come under Christian parivar.
All the shia and sunni muslim organizations including Terrorist organizations come under Muslim Parivar. Do you agree to these definitions too ?
VHP and RSS are linked because they are both Hindu in nature. By that same logic, all Hindu organizations must be part of Sangh Parivar or RSS.