We have to qualify a few things that it appears some of us ex-JWs have yet to shake off.
For years the Watchtower has taught us that "belief" in God and doctrines is what is important. Many of us who are atheist have come to assume that thus is the mindset of all religious people, namely that they "believe" in God.
But we have to let go of this Watchtower-ism as well. Not all religious people "believe" because, unlike the lie of the uneducated and very ignorant Watchtower, some religions find "belief" far from efficacious.
In Judaism, "belief" in God and doctrines is irrelevant and unnecessary. The mantra "God is dead" was actually invented by some Jews who survived the Holocaust. Many of these same Jews are still religious, however.
Catholic and Protestant critical theology teaches that the Fundamentalist call to "faith" is actually a warping of the New Testament teaching. The Greek words for "faith" and "belief" are actually one and the same, and they are better rendered "faithfulness (or faithful action)" and "give trust." The idea of having a "mental acknowledgment" that there is a God, scholars teach, is not a New Testament idea. The only reference to it is James 2:19 where the author states that mere "belief" in God makes a person no better than the demons.
But I do have to insist that those that reduce the idea of "God" to a mere mental acknowledgment do tend to act ignorant of some of the most credible realities such as evolution, climate change, etc. I assume it is this same attitude that makes them likewise ignore the above critical scholarship in exchange for mere "belief," so perhaps in this vein the answer to the OPs question leans not too little toward the affirmative. But in light of the above, especially since the Watchtower-ism of universal belief among the religious is not genuine, it cannot be said of all who embrace a religious conviction.