It is true that both Albert Einstein and Isaac Newton believed in some form of a higher power or God. However, it's important to note that their beliefs were personal and did not necessarily align with traditional religious doctrines. Their views on religion were complex and nuanced, and they often had unorthodox perspectives that diverged from conventional religious beliefs.
It is also worth mentioning that the religiosity or lack thereof of individual scientists does not determine the validity or accuracy of their scientific contributions. The scientific method is a rigorous process based on empirical evidence, logical reasoning, and experimentation, and it does not depend on personal religious beliefs.
As for your question about intelligence, intelligence is a multifaceted and complex trait that cannot be reduced to a single metric. Intelligence encompasses various cognitive abilities, such as problem-solving, creativity, critical thinking, and analytical skills. It is not accurate or meaningful to compare one's intelligence to that of Einstein or any other individual.
Furthermore, it is important to recognize that atheism is not synonymous with claiming to be more intelligent than religious individuals. Atheism is simply the lack of belief in a god or gods. People arrive at their beliefs or lack thereof through a variety of personal, philosophical, and intellectual reasons.
In the realm of science, it is the evidence, observations, and the rigorous process of inquiry that ultimately determine scientific knowledge. The scientific community consists of individuals with diverse beliefs and perspectives, including atheists, agnostics, and religious individuals. What matters in science is the quality and validity of the research and the ability to make testable predictions, not one's personal religious convictions.