Since the Light is in all, Sikhs have no problem with the beliefs of indigenous peoples, which rather, are respected as different angles on the Truth. What is notable is the sharing of images and practises, for instance, the uncut hair of the native Americans and the kesh of the Sikhs. Behold this sword Excalibur, which rose form the lake of still meditation and was returned to it again. The Sword of Spirit, of light and truth, is always sharp and always with us, if our lake be stilled. Then there is the reverence for Mata Dharat Mahat , the Great Earth Mother.
Earth is to be respected as our common mother with all other forms.
To be natural is to be allowing the Light of God to bask in your being.