He was making a very extreme metaphor for how much we must hate sinning in an adultrous/lustful manner. This was a reply to someone that called me a fake Christian (or even non Christians that claimed this about Christianity) one of the 'brood of vipers'. I was disproving him and that I did.
One of the reasons sola scriptura (which protestants adhere to) is very problematic is they read things and assume that the first literal interpretation is always correct. That isn't how you are meant to read all parts of the Bible, it's only how you're meant to read most of it. In that part, he was certainly being metaphorical and speaking in hyperbole. However what is literal, is you should rather lose and eye and hand than end up in Hell. That is the real key point he was making.
