I've noticed some non-creationists still use religious themes/characters in their "religion" ....doesn't make sense to me....if we're trying to get away from all the theological stuff, why use religious terms/deities/ideas??
Because they are archetypal symbols; symbols of transformation, to use Jung's term. They are not at the core about explaining nature like science does, though historically they were a part of how we talked about the natural world. Understanding evolution informs us about nature, and nature tells us of God. The creationist therefore in denying evolution, is denying knowledge of God. Or at best, their mode of thinking does not allow for anything other than a concrete-literal understanding, and therefore they cannot reconcile faith and reason.
Here's what I see as central to this whole "debate" on both sides of the aisle. Each side assumes creation is an event that occurred in the past, at the beginning of time, and so forth. But in reality, the implications of evolution say this. That creation is a continual unfolding, and evolution is the process through which creative advance into novelty is shown. As Ian Malcolm in Jurassic Park aptly put it, "Life always finds a way. It always finds a way". That's creativity. That evolution. And creation is right here, right now, happening moment, to moment. That's how we see God, as the creative force of Life itself, of Being and Becoming. The Creator, is creating; not did create at some point in history and sat back like some man in his lounger after mowing the lawn.
So there is no contradiction whatsoever in seeing God in nature. Evolution is the creativity of God, or Spirit in action. Only those who need to smash into an earlier understanding of mythic-literal thinkers imagine science needs to reconcile with their particular reading of their tradition's scriptures within a certain mental framework. The problem is their framework, cannot allow for something beyond it. It's like trying to put new wine into old wineskins, as Jesus spoke of.
Does it make sense to then also tell other religious people that their religions are false?
You won't hear that from me. Though I do believe there are better ways to understand these thing to be had as they grow into them. Wrong is an incorrect word. They are right for where they are at in their current contexts. Contexts change.