Something tells me you haven't read any of the granths you listed.
Many of them narrate the Katha of Gurbani that took place at Damdama Sahib, by Guru Gobind Singh Ji on their way to Hazoor Sahib. The Katha took 9months, 9days. Baba Deep Singh Ji was amongst the Sangat and asked Guru Ji for some sewa. Guru Ji told him that his time to fight will come, but to teach Santhiya, Gurbani veechar, parchaar etc in the meantime and to prepare Saroops of Adi Granth Sahib. Bhai Mani Singh Ji was also given this duty. From there, the 2 branches of Damdama wali Taksal began.
The Damdami Taksal is not a Samparda as such, but a school or jatha. Nihang Dals have been receiving Santhiya from Taksals since they began, and continue to do so. There's a video on Youtube, shot at Baba Bakala, where this relationship is explained during an event at a Dal. In fact, most puratan Sampardas used to, and still do, receive Santhiya from one of the Taksals - either by sending SInghs there, or from the Singhs that travel from one place to another.
Even Sant Gurbachan Singh Ji Khalsa, a mahaan Mahapursh, used to be a Nihang Singh before they joined the Damdami Taksal.
There is a huge amount of prem/ love between the puratan Samapardas - especially in Punjab - amongst Singhs who know we are all sons/daughters of Guru Gobind Singh Ji. The tree of Sikhi has many branches and all should be respected for the duties given by Guru Ji.
It is sad to see kids in the West use the names of beautiful Sikh institutions to boost their egos and create tribal wars that do nothing except feed the haumai Guru Ji tells us to wage war against.
Also, 'socialidiot', please don't use multiple usernames. Thanks.