Einstein didn’t believe in a Judeo Christian God that interacted with people and interfered with cause and effect. He left room open for Sinoza’s god who may have created everything and then just sat back and watched. He completely rejected heaven and hell and any life after death.
With this post, you have succinctly stated the truth about Einstein’s views, which changed somewhat during his life, but essentially could be characterized as Spinoza-Lite. The religious people hear who want to claim Einstein as one of their own obviously have not read his writings. Ultimately, it doesn’t matter what Einstein thought about religion. Some brilliant people have believed in the supernatural, and some have not. The more honest believers admitted their belief was not rational (a la Kierkegaard). The intellectually dishonest ones pretend to “know” that a god exists, or even that a god’s existence can be proven. Those who feel compelled to believe in the unprovable like to cling to the notion that someone like Einstein knew something others don’t. As an agnostic, I appreciate that Einstein felt humbled by the magnificence of the universe but that he saw no need to explain it by referring to mythological ancient literature.