Obviously atheists are pleased with the revelation that Einstein viewed religion as a childish thing. For believers it finally removes Einstein as the authority in a classic argument from authority.
But for non-believers, there is a note of triumphalism that understandable but we should be wary of using Einstein as an authority ourselves. James F McGrath’s piece at Exploring Our Matrix is close to my views:
Plenty of people reject the Bible and specific religious ideas without being “atheists”. The term “atheist” is itself confusing, since it is often unclear whether those who use the label understand it to mean a rejection of every notion of God, or a rejection of theism. Depending on one’s definition, pantheism may be a tertium quid left out of consideration, or a “sexed-up” form of atheism. At any rate, Einstein’s view of the term “god” as impoverished and human is one that plenty of mystics and theologians would share!