the reason summy has the nickname `vedic` is because he has continously said that sikhism is a `vedic` religion. when its been proven that its not. nothing against it though. the rss continously says this but Sikh scholars like bhai kahn singh ji nabha have proved it wrong.
Recent News Article: `RSS Falsely Claims Sikh Gurus Took Inspiration From the `Vedas`

The RSS will continue to only look at one side of history. Sikhs remember figures like Bhagat Namdev Ji, and Bhagat Ravidas whos bani is in the Guru Granth Sahib, but that doesn`t mean we forget traitors like Chandu, Gangu, or the hindu hill rajas, or great saints from muslim backgrounds like Mardana or Bhagat Farid Ji.