Yeah, like that's a surprise!<snipped for brevity>
So, the fact that there is 100% homochirality is evidence FOR common descent.
If we saw that half the mammals were left and half the mammals were right, that would be an ENORMOUS PROBLEM for evolution.
You have your argument BACKWARDS.
I just love it when the fundies don't even understand enough about what they are saying to realise when they are contradicting themselves.