Bizarrely, many Americans cling to the quaint notion that murder is wrong. We have a long way to go to catch up to progressive Europe!
Also, it's slightly ironic to compare the american view on murder with a european view when you're the ones executing people.
The opposition believes that nobody has a right to make the conscious choice to kill another human being. That sounds like a reasonable place to start.
I'm consistently dismayed by the amount of intellectual and moral atrophy displayed in discussions of politics.
On the flip side, how about contraceptives? If removing a fetus after 4 weeks is murder, how about birth control pills? Or emergency contraception pills? Arguably, they kill as well?