answered
2017-01-02 05:14:21 -0500
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Its important to sing the praise of Almighty God in the SadhSangat.You should not discriminate with the person whom you are sitting,whether its low or high caste.If I talk about Kirtan then you should feel good when you listen to Kirtan,not when you listen to Kirtan from particular person's mouth,or particular people's(like namdhari's) mouth.Because Gurubani is word of Guru not of a person,so it connects us to God,whether you recite it alone or with Amritdhari Sikhs of Guru Gobind Singh ji OR with Namdhari Sikhs or anyone else.
Moreover [I AM NOT 100%SURE]according to Hukamas of Akaal Takhat Sahib a Sikh should not marry Namdhari Sikhs because of mascare of Amritsar in 1970's.