Einstein grew up frum?

 Recently in Binah magazine there was a claim that Einstein grew up in a frum family but went astray because of foreign influences. The  purported source was Understanding Einstein by Dr. Gary Moring

Below is the page 133 where Moring discussses Einstein's relationship to Judaism but doesn't say he was ever an observant Jew and the full title of the book is The Idiot''s guide to understanding Einstein and it says author has M.A. not PhD