How can someone be THAT stupid?

well, I've just encountered a post on reddit talking about the apostasy in islam and u know what happened? I found people who are willing to have their brain cells dodge that by every possible mean ( "the apostasy was in that era only and we shouldn't apply it now" or "killing them is fine cuz other religions have this judgment" or "this judgment is being taken by the judge not normal people , so it's fine"). I'm pissed off of the religious people trying to fit their religion into reality rather than seeking the truth.