There are religious folks whose work I reference or use frequently, but they keep their beliefs to themselves. Don Knuth is a canonical example of this for me. No issues there, anyone should be free to believe whatever gets them through their day.
In my (subjective, biased, maybe incorrect,) opinion, people whose code of "ethics" includes phrases like "keep death daily before your eyes, fear the Day of Judgment and be in dread of hell" are dangerous. I doubt they're even aware that hell was voted in existence centuries after their savior was crucified. The amount of life lost and the intellectual stagnation stemming from these religious fanatics, these broken people, is staggering. We'd have reached Alpha Centauri by now were it not for them.