The last born in my family was a Down Syndrome person. Back then I had never heard that term; he was "retarded", "mongoloid". Some kids, even adults made fund of him. Neighbors who knew him, us, were great. As an early teen I was embarrassed by him. I could only relish though in watching his joy in being who he was. I wept when sadness or anger overflowed in what I perceived was frustration for what he couldn't do as others could.  He was different.  He was outside the norm and being outside that norm had consequences.  Not one of them included "evil" - even though, sadly, erroneously, some people contended that "retardation" was a visitation of God's ire for some transgression. 
I have grown to see Jesus so much more clearly in Down Syndrome than in most people. 
Think about it - outside the norm is intrinsic to nature. That is "natural law". God is telling us something about judgment and judging, about ourselves.
We don't have to be stuck in a backward cultural bias and miss so much.