maybe... , however, I find Sikhism closer to Atheism than to other religions. Sikhism is an entirely different way of looking at the relationship between Creator, so different perhaps, that Atheism is the only theism that comes close. Most religions offer some enticement to live in a good way, and also some means of installing fear to ensure you stay on the straight and narrow. Atheists that believe only in the power of Creation, in living side by side with Creation, assisting Creation, helping, and generally 'doing the right thing', for no other purpose than it is 'the right thing', I find extremely refreshing, they are Sikhs, they just do not know it. They do what they do for no reward from a deity, they do not beg the deity for luck, for cars, for houses, for love, they do not inflict their own opinions or wishes on another and justify it by using said deity. The only difference I can see is that a Sikh knows what the 'right thing' to do is by studying Bani, whereas an Atheist has to rely on what they have seen in life to give them a similar take. However, I can confirm, having been both, that having a good kicking at the hands of life, teaches you exactly what is written in Bani, although the former is more painful and leaves a few scars.
The content if Atheism is humanism, as for rejection of a certain type of belief system, well, I would say that is how Sikhism itself was born.
yes, just like Sikhs, individuals who shout from the hilltops that the emperor has no clothes.
as indeed you could be a Sikh and all the above........
A sikh lives their life in consonance with Creation, adopting the facets of Creator in all interaction with Creation. It is not for looking skywards each time a good deed is done, nor for keeping a track of deeds done, like some sort of balance sheet, it is a way of life, a way of treating all those around you, be they people, animals, insects, but done in a common sense way, it does not mean you let Creation own you, walk all over you, but you treat Creation with respect and be grateful for the resources available to you and make the best of them.