I would say that any human can do seva, Sikh, Atheist, Muslim, Hindu, Christian, Agnostic, elder, child, female and male, anybody.
We Siksh do not have a monpoly on helping others, how ridiculous. Taking amrit is soooo important a step and the OP's post highlights that not enough though goes into it with some people.
When I think of Amritdheri Sikhs I think 'True Sikh of Guru ji'. I expect to never hear an uncross word, I expect see the light of love for all humanity shinning in their eyes, I expect exemplary behaviour.
When Guru ji talks about being present where-ever you'll find 5 (or more)GurSikhs, it is Amritdhredi Sikhs I see in my minds eye.
It is clear though, and it is clear enough for all of us to see it that many of those who have taken amrit still have their feet stuck in the mud of maya, their heads are with humanity and their own station in amongst us, do not take amrit untill you can be said to be worthy, well that is what I say anyway.
