....which is really atheism, just put a fancy way. And he wasn't sure about it, which makes him an agnostic atheist. So, like I said....
Pantheism is the belief that all
reality is identical with
divinity, or that everything composes an all-encompassing,
immanent god. Pantheists do not believe in a distinct
personal or
anthropomorphic god and hold a broad range of doctrines differing with regards to the forms of and relationships between divinity and reality.
Pantheism was popularized in
Western culture as a
theology and philosophy based on the work of the 17th-century philosopher
Baruch Spinoza,

.7 particularly his book
Ethics, published in 1677. The term "pantheism" was coined by Mathematician
Joseph Raphson in 1697 and has since been used to describe the beliefs of a variety of people and organizations.
Pantheistic concepts date back thousands of years, and pantheistic elements have been identified in various religious traditions.
So, Mr. Einstein may not be in heaven, but it is likely because he had a paganised view of GOD that is quite old and had no Savior.