Not just lack of religion. Anything but the mainstream also gets pointed to. If you’re from one or more “pagan” religions (e.g., luciferianism, satanism, hermeticism, wicca, göetia, neo-hellenism, gnosticism, umbanda/kimbanda/candomblé, new age, or simply a free non-conformist esoteric/occult person as I am as a worshipper of the Dark Mother Goddess), most people tend (not everyone, so it’s not a generalized rule) to have a suspicious look at ya, even atheists (again, no intention of generalize here). I’m saying that because I was once an atheist, I was once christian and now I’m a “pagan” person, and I’ve been noticing the religious biases of the society against esoteric beliefs. For example, in my country, a syncretic Kimbanda temple tried to raise a statue for Lucifer, the light-bringer (Lux ferre), and the city hall stopped the temple of rising the statue, because people saw it as something “diabolical”.