Albert Einstein also wrote a piece in favor of socialism, called "Why Socialism", you can find it on the internet.
It is clear that Einstein rejected the God of the Bible. He made conflicting statements about his atheism.
"I'm not an atheist, and I don't think I can call myself a pantheist. We are in the position of a little child entering a huge library filled with books in many languages. The child knows someone must have written those books. It does not know how. It does not understand the languages in which they are written. The child dimly suspects a mysterious order in the arrangement of the books but doesn't know what it is. That, it seems to me, is the attitude of even the most intelligent human being toward God. We see the universe marvelously arranged and obeying certain laws but only dimly understand these laws. Our limited minds grasp the mysterious force that moves the constellations."
I’m not sure where the above quote came from or at which stage of his life Einstein wrote that.
IMO it is not important whether or not Einstein labeled himself as an atheist. All that matters to me is that he was deeply aware of the grandeur and mysteries of nature and he had the courage to say that he was ignorant about its ultimate nature.
I have a book of talks he gave over the years to various groups, and it's a fascinating read.
Is it a published book, available?
@WilliamFleming This is it.
[amazon.com]