Yes, we are privy to evidence not available to Newton.
I'd have been a theist had I lived in Newton's day as well. Nothing else could have made sense given that level of understanding.
His generation laid the groundwork for deism by showing us that the universe ran like a clockwork without the need of intervention by a ruler god. Thus the builder god who then exited the universe was conceived.
Then, another wave of scientist revealed that the universe built itself from an expanding mote, and that the tree of life assembled itself from an initial seed of life, and the builder god was no longer needed, either.
So yes, we know a lot more than Newton did. We are privy to evidence he didn't have.
- "Although atheism might have been logically tenable before Darwin, Darwin made it possible to be an intellectually fulfilled atheist" - Richard Dawkins
What jobs are left for a god? Creating those initial seeds? We have naturalistic hypotheses for their origins, and thus have no need for a god hypothesis at all.
That doesn't mean that a god or gods cannot or do not exist, just that the march of scientific progress has demonstrated that we don't need one, and that there is no reason to believe that one exists at this time.
- “We explain our existence by a combination of the anthropic principle and Darwin’s principle of natural selection. That combination provides a complete and deeply satisfying explanation for everything that we see and know. Not only is the god hypothesis unnecessary, it is spectacularly unparsimonious.” – Dawkins