Do you suppose to tear the white part off on liver cheese sandwich?

There's no "white part" on a liver cheese sandwich.

Liver cheese, also known as liverwurst, is a spreadable meat product made from liver. It's typically sold in a tube or container and comes in various flavors, including plain, smoked, and seasoned.

You can eat liver cheese as is, or you can spread it on bread, crackers, or other foods.

If you are thinking of a different type of sandwich, could you please clarify what you are referring to?