I can use Sri Guru Granth Sahib Ji to promote anything I wish, by god its done here by Hindu orientated minded people to Castists and so on, that's why these texts exist, to show the real meanings and arths. So find it in practice where Sikhs followed it all. Find sources from the 17/18th centuries where Rehitnamas from Guru Sahib were used and prove your points. All I'm asking you to do is provide the historical proof, which you seem to shying away from.
If that's too much for you then don't ask others to provide evidence in ANY thread when you can't do it yourself.
Your "evidence" is 1 quote, the first line. That's all you know about SSGS, the mool mantar and nothing more, you can't even read Gurbani and you obviously don't. That very quote can be used for ANYTHING, to promote ANYTHING.
What source other than the sggsj do you need.. Why do you want something from the 18th and 19th.. When you can go back to the 15th and 16th..
how idiotic can one person be? Are you really suggesting sikhi doesn't promote egalitarianism?