MatthiasGould
Alhamdulillah!
Not all followers of the Left-Hand Path are angsty teenagers who dress in black and burn Bibles. Some you wouldn't even notice on the street, let alone hear them start a conversation about their religion.
Funnily enough I knew a guy almost 5 years before I found out he was a Theistic Satanist. Once I got past the 'oh no, he's a Devil worshipper' stuff, he actually taught me quite a lot about his beliefs and I began to really appreciate his beliefs for what they really were.
I'm studying Sikhism at the moment, and one of the biggest mistakes people seem to make is mistaking Sikhs for Muslims. This is particularly the case for Sikh men who wear the turban. what is not particularly helpful is that nearly everty depiction of Arab culture from Disney's Aladdin to the Jyllands Posten cartoons shows men wearing turbans, which is actually quite uncommon in most Islamic countries. There are some Arabic forms of turban, but they look nothing like the Sikh turban which is much more rounded and taller.
Another one is the kara bracelet. People seem to assume this is just jewellery when in fact it's a commandment of the Sikh faith to wear one. Sikhs are instructed not to have fancy gold or silver karas either to emphasize the kara as not being decorative but reminding them of God.