I think someone said it above but that’s probably because there were less French immigrants in the 19th century compared to Italian, German, and Irish. Italy and Ireland had famines and Germany had a revolution in the 19th century which led to lots of immigrants to the US. Many (maybe most) French immigrants were much earlier which may have led to decendents feeling fully American versus calling upon a more recent immigrant identity.
Anecdotally, I know a guy of French descent whose family had settled an area (forget where now) before the US existed. They chose to join the US (voted for their state to join the union) and felt fully American. It’s possible that many more older French settlers felt the same.
Half of the old testament just feels like health codes. This is make sure to not poop where you live. Other stuff is don’t eat foods that will make you sick.