The Ashanti viewed them as ritually unclean. Even a ritually unclean Cohen could enter to perform various housekeeping duties. Demons exist as manifestation of evil or unclean spirits. Purification precedes conversion and constitutes a turning away from all that is unclean and unwholesome. He was forbidden to accept cooked food from any unclean person. He characterizes certain foods as either forbidden ("unclean") or acceptable ("clean") to God. Never before did they know of God except to serve idols and unclean things. Fourth, South Asians were stereotyped as unclean, diseased and a threat to public health. The view that Zoroastrians are "najis" ("unclean") has also been renewed. Afterwards they were given baggy, unclean, and uncomfortable prison clothes and taken to dinner. Obedience to these laws means abstinence from pork, shellfish, and other animals proscribed as "unclean". The diet also encourages the removal of unclean and unacceptable foods from the individual's diet. In Judaism and early Christianity tortoises were seen as unclean animals . Barlow then forces Callahan to drink his vampire blood, making him "unclean". The band often uses the dynamic of clean and unclean vocals.