As a practicing Christian¹, I can honestly say the BSD Daemon never bothered me. It's kind of clever. Also, I have it on good faith (heh) that the FreeBSD developers aren't satanists.
Expressions like “speed demon” don't bother me either. The general concept of a demon is somewhat different from a fallen angel; I don't have trouble with demons being painted in a neutral/jokingly positive light, unless the demon obviously refers to the devil or affiliates (in which case “woo the devil is awesome!” makes me moderately uncomfortable).
¹ Odds are I could even get labelled as a backwards religious fundamentalist.
Expressions like “speed demon” don't bother me either. The general concept of a demon is somewhat different from a fallen angel; I don't have trouble with demons being painted in a neutral/jokingly positive light, unless the demon obviously refers to the devil or affiliates (in which case “woo the devil is awesome!” makes me moderately uncomfortable).
¹ Odds are I could even get labelled as a backwards religious fundamentalist.