We have a President who is the de facto leader of the Religious Right, whose appointments top to bottom show this.
We have a two party system, with the one that has managed to capture 2/3 of the last 6 Presidential elections having a platform that caters heavily towards the Religious Right. That party now has a majority in Congress, and is on the edge of winning the Senate as well. By all accounts, despite a thin margin in the Congress, the actual level of party control is probably higher than at any time in the last hundred years.
I'm not sure how much stronger religion could get before you would stop worrying about State Atheism. I'm also not sure which "before" you are talking about. It isn't the before of the 70's since religion today is much stronger than it was then. In fact one of the major goals that has so far eluded the Religious Right is to overturn Roe vs Wade, the high-water mark of judicial liberalism.
Is religion today stronger than religion was a century ago? I'd guess not. A century ago the threat of organized religious power was enough to motivate several states to amend their Constitutions to protect themselves further against it. It was one such measure that lay behind the lawsuit that started this thread.
Is religion today stronger than religion at the founding of the USA? Based on a number of things that I have read, I suspect so. But I am not historian enough to say for sure one way or the other.
Is religion today stronger than religion in the time of the Pilgrims? Certainly not. And I'm not ashamed to be glad about that.
Does the strength of religion vary depending on where you are? Certainly. I choose to live in a less religious area. I categorically refuse to live in the area known as "The Bible Belt" because my interactions with people from there have left me with the impression that I, as an atheist, would be made uncomfortable. I get along with most people of most beliefs perfectly well. But having people target me for conversion gets old, fast.
I'm guessing from your comments that you are religious and you might feel persecuted for it. If so, then I'd suggest that the martyrdom is more perceived than real. Objectively there is little reason to fear for the strength of religion today. And history suggests that the First Amendment has strengthened, rather than weakened, religion in this country.
Cheers,
Ben