Absolutely not. Everyone is allowed to listen to and like death metal.
Death Metal
I usually listen to pop,electro,techno,rock,death metak,metal,nu metal,epic,rap...
There are a number of places on the internet that one can listen to brutal death metal music. Some sites that you may want to try include Youtube and Pandora Radio.
Metal-core is more popular because is easier to listen.
No. If you want to listen to a "Satanic" metal band, try Behemoth.
death metal
I wouldn't say it's death metal but try "Woe, is Me" listen to the whole thing it gets heavier as it goes.
There are many great death metal bands out there, it depends on the type you like. Not all death metal is the same. Some people like Morbid Angel, but I prefer Cannibal Corpse. I would recommend Cannibal Corpse, listen to "Evisceration Plague" or "Priests of Sodom" (songs). A good place to find what death metal bands you like would be to listen to Death FM, an online radio station. The listeners chose what is played. "Death" is an excellent band Deicide is good too
Whitechaple is a band i have started to listen to and there pretty amazing.. there death metal, witch is pretty sweet ")
Try Born of Osiris. I believe they are progressive.
The American metal band Asbestos Death got famous for their type of music. They are a heavy metal rock band that has followings mainly of teen and young people in their 20's.
Almost none. It depends. Just google it. But if you hear it on mainstream American radio, it's not death metal.