I don't know where you got that information from but it is majorly wrong. The Dasam Granth doesn't contain ANY of that stuff. Nothing about amrit, a vengeful God or dress.
Rather it is a compilation of stuff from the last Guru's period, not exclusively by Guru Gobind Singh Ji. The largest portion of it is simply translations of puranic mythological material probably by the poets the Guru had in their darbar.
I will try and provide citations, because I do remember reading texts that disclosed these ideals. I believe that they were necessary to motivate an otherwise peaceful community into a fearsome army ready to stand against those who denied human beings their human rights. The
kara is a donkey's collar. The donkey only responds to punishment and reward (the carrot and the stick, as it were), and Guru Gobind Singh Ji understood that this herd of donkeys who had the capacity to act like savages under the incorrect leadership needed to be strapped up and pushed forward with the right drive.
As I say, I will attempt to provide citations at a future date.
I find it difficult to accept your idea of a separtion between Sikhi and Khalsa. Khalsa was the final form that contained all of the spiritual side you mentioned but also an added practical realistic dimension to deal with some harsh realities of life and survive them. Sikhi as you view it, in my opinion, is incomplete without it. It then simply boils down to hippy stuff, remember the Khalsa ensured the survival of Sikhi. When times are bad, it is Khalsaism (as you put) that will pull us through.
I agree with you on one point, and disagree on another.
I agree that Khalsaism was completely necessary (as I stated in my earlier post) in order to enforce the principles of light in a time of darkness.
A country makes laws to instill justice and a sense of principle within the nation, but without a police force or military force ready to uphold those principles, those laws become little else other than {censored} in a stiff wind.
However, I disagree that the Khalsa as Guru Gobind Singh Ji created it were the "final form".
It appears to me that the Khalsa were the
contemporary form that was created as per the requirements of the time. Indeed, Sikkhism talks of the perfection of God's creation; the universe. And one of the defining features of the universe is the occurence of change and evolution. How we view Sikkhi today is not the same as it was viewed in either Guru Nanak Dev Ji's time or even in Gobind Singh Ji's time. The Gurus were
fully aware that changes would occur, which is why they created the
akal takht in order to allow the Sikkh populus to become a self-governing nation that was not bound by the Dassam Granth, but was bound only by the Guru Granth Sahib (which, by the way, contains nothing of turbans, dress codes, etc...this is all in the Dassam Granth).
Guru Gobind Singh Ji had the choice to promote the Dassam Granth to the state of Guruship, but he did not do so. This was because the writings in the Dassam Granth - like the wearing of the turban, etc - were of historical and principle value, but they were bound by their time. Unlike the Guru Granth Sahib, it did not contain actions and principles that were not bound by time. And Guru Sahib knew this.
Therefore, it is my contention that the form of the Khalsa as given by Guru Gobind Singh Ji and detailed in the Dassam Granth may indeed have been the "final form" of the Khalsa...but only until
that time. Had Sikkhism started in the West or in more recent times, I doubt the "final form" of the time would be the same as it is now. And rightfully so, because evolution and change is the Will of God.