Yes, it's amusing that the simplest way (for atheists such as myself) to justify deontology is with a utilitarian argument; having deontology principles is good

Yes, it's amusing that the simplest way (for atheists such as myself) to justify deontology is with a utilitarian argument; having deontology principles is good because those principles produce good outcomes. But I think my point stands, that utilitarianism without any deontological safety rails is a recipe for mass murder.