Euthanasia: A Further Erosion of Familial Understanding: "For him, reading about this stuff had thrown everything I'd said about abortion into a completely different light. What he'd realized is that once you concede the principle that some lives are not worth as much as others, that many human lives are not worth living, you undermine the whole edifice of universal human dignity. Once you've made one exception, why not others?"
'via Blog this'
Yep, that's exactly why euthanasia and abortion- one at the end of life, the other at the beginning, but both taking away life that could be lived- is wrong.