I have no idea how this thread ending up here after starting nicely but yes- the German, French AND Italian cuisine is full of stuff like kidneys, tripes, heads etc.

Regarding all this I would qualify as an American because I never ate it, even at a child. In Paris there used to be butcher shops that had nothing but that stuff (entrailles it's called, that means guts) and I couldn't even go along them as I couldn't stand the smell.

However, being an advocate of cultural relativity: in all poor cultures, meat is not wasted the way we do it only eating ribs and fillets and converting the rest to cat food