According to Wikipedia, Einstein went to a Roman Catholic school and his parents were "entirely irreligious". But that doesn't rule out some Protestant cultural influence, I suppose.
> Central European protestant culture of hard work and valuing education
Is there evidence that such a thing exists? Is there a "Central European protestant culture" at all? A central European culture? That's a big place. Many people in many communities around the world value hard work and education; many Protestants in Central Europe do not.