The Yazidis worship a demi god called Taweus Melek who they sometimes refer to as Shaytan (Arabic equivalent of Hebrew Satan). He is the same character whom refused to obey God's command when asked to bow before Adam. In Yazidism he refused to bow before Adam because he wouldn't bow before anyone but God and God commended him for this. In the Abrahamic faiths he refused to bow before Adam due to his pride and was resultantly cast out of heaven. In Yazidism he considered to be good and the archangel unlike in the Abrahamic faiths where he's the instigator of evil and a fallen Angel or Jinn. So they may seem to be devil worshippers to outsiders, but maybe not by their own definition. Even if they are devil worshippers it's no excuse for prejudice or persecution.
NO
yes
Nope
Yes
The band Black Veil Brides are not devil worshipers. The lead singer has confirmed that he is an Atheist, but he has stated that they do not worship the devil, or anyone (God or Christ Jesus).
Nooo!! They are Christians!
unknown.
There is no benefit to anybody.
I see no evidence they worship the Devil.
No! Not at all. Just because they do a lot of screaming and cursing (they also have dark lyrics) doesn't mean they are devil worshipers. It has nothing to do with the mask too.
No. They are spiritual but not religious.
Very unlikely. Smith is one of the most common names in the US; there are actually 2,747,407 people named Smith. If they were devil worshipers, that many would be pretty hard to hide.