Albert Einstein was a scientist who is most famous for his theory of relativity. His image and work has grown to be that of a cult and his name synonymous with "genius". Albert Einstein received a Nobel Prize for his work on the photo-electric effect, not for relativity which many lay people often surmise.
Criticizing Einstein in mainstream science is greatly frowned upon and is often seen as "quack" or "pseudo" science.
Disputing Einstein's Genius
One of the arguments that Einstein was not the genius he is claimed to be is the fact that his first paper was most likely heavily co-authored by his then wife at the time.