They have brought skills over long periods. Primarily in banking and financial services. They have also historically contributed much to the rag trade (drapery, haberdashery and women's clothes). Jews are pre-eminent in the menswear business. They obviously have a skill in retail.
They also bring culture and craft to the arts.
(PS, I am a Gentile)
They also bring culture and craft to the arts.
(PS, I am a Gentile)