"Atonal music" isn't music. It's garbage noise dressed up as sublime.
Classical music sounds good in the human brain because the human brain is designed to recognize music that sounds good. It is also designed to recognize junk sound that isn't music at all.
No matter how much agitprop you cram into the mouth, nose, eyes and ears of the sheeple, deep inside they still know that this dreck is awful. Period. You can't beat a million years of evolution with a couple of shows on Oprah.
Rap music is atonal music that tries to conceal the lack of musical ability with a beat and voice-over. Atonal orchestral music attempts to hide the fact the author had no musical ability by pretending he wanted it to sound discordant and horrible. All this stuff is solipsist, self-referential logic for people too lazy to show up at real day jobs and try to do honest work.