You're joking, right? You must be joking. In the off chance that you are actually serious, about the only thing you got right was that it's really angry heavy metal.
First off, it's American. There is dispute as to who was the first death metal band, but there is no dispute that it is either Possessed or Death. Both of those bands are American. So are the rest of the pioneers of the genre: Obituary, Morbid Angel, Cannibal Corpse, Deicide, Autopsy... (Oddly, most of the original death metal bands are from Florida.)
Secondly, the lyrics do not promote rough sex or violence, and they have absolutely nothing to do with Nazis or whatever Nazi rap is. They lyrics of many of the bands are about violence (not promoting it), much the same way a horror film is about violence (and not promoting it). There are many other topics from politics to religion to science. The band Death has a song about abortion titled "Altering the Future."
I suppose I should stop now as I suspect your post was in jest and it went right over my head... anyway, coincidentally, I saw Morbid Angel for the first time last Saturday, Obituary for maybe my fifth time a week and a half ago, and Cannibal Corpse for the umpteenth time a month ago. They're all still rockin'
The top death metal bands by nation:
https://www.thetoptens.com/countries-with-death-metal-bands/
Germany ranks SEVENTH.
I’ve seen 3 of the Finnish bands in the last year.
No, I’m not joking and no, I haven’t researched it-I do know that my co-workers’ CDs are from Germany, the vocals are in German and from his translation, they do talk about Nazis, involve sex, and violence to LEOs like a lot of American rap crap does-I only speak English and Spanish-not German or any other language, so I can’t vouch for his translations. It is also obvious that the stuff he is listening to is not exactly mainstream, but underground type music-and that co-worker is a skinhead-and maybe a neo-Nazi for all I know- with tats of skulls, symbols, etc covering arms, neck-and a prison tat on his cheek-no way do I want to know about that- who keeps to himself-he does listen to some American Death Metal-he had us all listening to a CD at work once that had a couple of Death tunes on it-tamer than the German stuff, but I still can’t say I could listen to a diet of that-I don’t even like listening to Bloodrock’s DOA-but since he is an excellent electrician and just edgy enough to be a scary old guy, we humor him...
MrT5 was from the Seattle area-he and one of his sisters got me listening to Seattle punk/grunge/whatever-I still do once in awhile, but not around my employer and best friend or my guy-they both have a pathological hatred of that genre-even the opening bars of Come as You Are or Lithium are enough to send either of them into a frenzy, never mind the more recent tunes-one size does not fit all...