Finding out about the 'something our minds cannot grasp' is not religiousness it is humanity.
I think you're right. Atheists may be equally aware of the "feelings", whilst being satisfied that all is part of nature, and that a deity is not required as an explanation. It appears, though, that Einstein held a different view. To him religiousness was the recognition of a deity ("behind anything that can be experienced there is something that our minds cannot grasp"), and he was saying that nothing is totally explicable by any other means. It may be reasonable to assume that he saw God as the necessary fundamental principal behind all of existence. Is that less scientific than any other reason-based speculation regarding the universe? One could argue that it falls into the same category as string theory and multiverse theory, both of which comply with observations, but neither of which can untimately be proven.
