Clearly. It's not just coincidence that it happens to be the one genre of music invented by black people.
is this ironic or not I honestly can't tell
Very unusual for your sarcasm detector to be defunct.
I don't know shua well enough to have gleaned much of any indication that it was sarcastic. Truly a stupid thing to say with a straight face, but I can't see faces or hear inflections here. He should have used that abominable question/exclamation mark.
His follow up polka/Nazi reply did the trick though.