So are you more afraid of a rejection or an deluge of logical arguments to a conversation that merits emotional addressal?
I want to help if I can, but I think the forums has hardly any context.
My first reaction when you said that they're the "burn in hell" type is that it simply wouldn't work. Helping you with a "how" type question can only really work when we can develop some kind of strategy for you. And that requires knowledge.
Personally, I would err on the side of catching them when they say that they love you or some affectionate thing, then asking more clearly something like "you love me, right?" Then when they'll undoubtedly say yes, then you say something like, "then I feel like I need to say something...."
Just think it out, feel it out, and say it at the right moment. I cannot guarantee that this is a good solution, but it says to your parents that you value their love and that your identity has nothing to do with how you feel about them.
