More so the innate need to question that other animals don’t.
Spirituality implies a personal thing : between the self and one’s connection (real or imagined) with one’s higher power. Religion is just the end result of standardizing that across a cultural group for a variety of reasons.
At best it gives concrete direction for best life practices (Buddhism, although not a religion despite being relig-ified and Judaism, despite being obsolete) or genuine cultural cohesiveness (Judaism, Islam - to a much lesser degree).
At worst? God where to start?
Myth making (Christianity, OT) ; deification of mortals (all four, including Buddha), which leads to a spiritual hierarchy in which the end-user must supplicate and defer to arbitrarily chosen “superiors” for fear (emphasis) of divine retribution ; intrinsic xenophobia (crusades, jihad, missionary work) ; etc.
Obviously for the topic at hand, it’s the way it’s inveigled itself into law making. Shariah law, canon law specifically. Is there some bizarre Baptist version? The issue is that these are not bringing in any of the “at best” principles. And how can you? Spirituality basically gives you “strive to always be a good person to yourself and others”. Period. Which fails utterly once you start putting conditions on it. Hardly helpful when there’s a trade or resource dispute.
So bashing religion? I’m afraid they’re all too preposterous now to be of any true value. Even Buddhism has become a bit of a joke despite the fact that its core is untainted.