Einstein was European, not Hebrew. European Jews are late converts, the Hebrews, like other Semites* are darker-skinned people.
* - Excerpt from Wikipedia:
The term Semite means a member of any of various ancient and modern Semitic-speaking peoples originating in southwestern Asia, including; Akkadians (Assyrians and Babylonians), Eblaites, Ugarites, Canaanites, Phoenicians (including Carthaginians), Hebrews (Israelites, Judeans and Samaritans), Ahlamu, Arameans, Chaldeans, Amorites, Moabites, Edomites, Hyksos, Arabs, Nabateans, Maganites, Shebans, Sutu, Ubarites, Dilmunites, Maltese, Mandeans, Sabians, Syriacs, Mhallami, Amalekites and Ethiopian Semites. Link