Yes that's what I was alluding to, there is grace involved but there is convoluted series of opinions as to what makes you become removed when you miss prayer. You are in a danger zone of dying as a non-muslim. But khawaarij would automatically relegate you as permissable to kill1. it's abandoning prayer
2. theres a difference of opinion on what abandoning prayer constitutes
3. the person is given three days to start praying again
4. this is not a small "nuance" differnce at all. prayer distinguishes the muslim from the kaafir.