OP’s argument has to be made. You want to shave off as many of the fools following that twisted ideology as you can, via any argument that rings true. Which means your argument also needs to be made, but I don’t think it’s going to convince a lot of conservatives or undecided voters. Hell I think pointing out the hypocrisy as OP is doing is more likely to convince them to become atheist, than your argument is.

Removing religion altogether is a long term goal that sounds nice. Not having the world’s superpower go fascist is a short-term one that is essential. Turning a fundamentalist christian into a compassionate christian makes the danger go down significantly. And you can get decent traditions of charity and even activism from the compassionate side of christianity.

And on a final note, I’ve been in atheist circles long enough to see some of them go bad. Like racism, mysogyny, etc. Atheism does not cure all. Religion makes things worse but is not the source of our problems.

What I’m trying to get at, is society’s problem run deeper than religion vs atheism, it’s just one dimension, and not the most important.