I have great respect for Sikhs. I went to Navy boot camp with a Sikh. He stood out, not just because he was tall, but that turban bounced above the rest of the dixie cups when we marched information. He was dedicated and loyal. I worked with Sikhs in my career and always found them honest and trustworthy, and very intelligent. My favorite Indian food restaurants are run by Sikhs, as well.
Here are a couple of links about Sikhs that might help.