Because they aren't all Jewish. The Rothschild family didn't even claim Jew until they started hiding behind then.

"Recorded in the spellings of de Rothschild, Rothchild, Rothschild and Rothchilt, this is a famous surname of Austro-German origins. It is said to have been habitational, and to originate from a house or houses which had a red shield as the doormarker, and this may well be so. Before the advent of street numbering it was the popular practice to designate a property by some form of display. In time the only properties that continued with the practise were inns and hotels. Most early recordings of the name are protestant, a few Catholic, and sometimes Jewish, and this multplicity of religions can cause confusion, but in fact has nothing to do with the origin. The famous banking family of Rothschild traces its origins back to a Meyer Rothschild, born in Frankfurt in 1743. As to what this family were called prior to this time is unclear, but it is almost certain that Rothschild was a name adopted by them. Prior to this date they would almost certainly have been refugees from the Turkish Empire or Middle Europe. Early examples of the surname recording taken from surviving German church registers of the period include: Simon Rothschild, who was christened at Bantrupe evangelical church, Lippe, on April 29th 1714, and Edmund Rothchild, christened at Burgsteirfurt katholic church, Westfalen, on July 14th 1813."

The claim is that their prior surname was Bauer, so lets go over that too so you don't cry.

Bauer- "Origins Available: Danish, German

The historical and enchanting region of Austria is the birthplace of the distinguished family name Bauer. Austria, which was originally home to a Celtic people, was conquered by the Roman Empire in about 15 BC. Following the fall of Rome, Austria was repeatedly invaded by barbarian tribes, such as the Vandals, Visigoths, and Huns, who swept in from the east. During the 5th and 6th centuries, the Alemanni, Avars and Slavs settled Austria. The Avars were defeated in 785 by the Frankish emperor Charlemagne, who set up the East Mark, which later became known as the Österreich. Otto I defeated the Magyars in 955. Austria was ruled by the Babenburger dynasty until 1278, when they were succeeded by the Hapsburg dynasty, which ruled Austria until the 20th century.

Bauer Early Origins

The surname Bauer was first found in Austria and Bavaria, where the name contributed greatly to the development of an emerging nation which would later play a large role in the tribal and national conflicts of the area. In later years the name branched into many houses, each playing a significant role in the local social and political affairs.

Bauer Early Notables (pre 1700)

During this period prominent bearers of the name Bauer were Bruno Bauer (1809-1882), who was a controversial German theologian, historian, and student of Hegel. Ludwig Amandus Bauer (1803-1846)..."

Have a nice day, shill boy.