I wouldn't say it all boils down to religion. I would say that scientists disagree on what constitutes 'intelligent' life. some say animals that are 'self-aware'
others say only humans.
the point being, legally, a human cannot be killed. so while it may seem hypocritical to kill an animal, at the point the fetus is officially 'human life' it would be illegal to kill it based solely on scientific terms and not religion.
and while I don't want to get into a religious debate here, I'm also not going to ignore the comment you made about the basis of religion. Some religions do not even believe in an eternal punishment of any kind, and I personally, as a Christian, do not have my beliefs because I fear hell. now I'm sure you'll disagree with me, but let's not argue in this thread about that. you can PM me if you want to discuss it.
The "science" of the issue is based solely on a moral one, however. When you think about it, there's no scientific reason not to kill another human being, or not to kill anything living for that matter. It's completely based on morals. And the science issue (based off a moral one) is whether or not a fetus is really technically a "life" or not. Of course, science doesn't exactly fit into this debate all that well, when what someone considers a "life" can change. And that's where the actual debate comes from. A moral view on what life is, and since most, if not all, morals stem from religion, then I conclude that this is a religious debate.
As I've said before, what this issue is really about is the freedom to choose.
I never really understood the opposition, come to think about it. If you don't like abortions, don't have one. But don't take it into the courtroom and say that no one can have an abortion just because
you believe a microscopic piece of gloop is a life. Once you get the facts in that the parasites are scientifically a life, then you can take it to the law. So these people should spend their money on research, not spend their money firebombing abortion clinics.
I, personally, dislike most rap music; I believe a majority of it causes murder, discrimination, sexism, and a boat load of rather unfriendly events. However, I refuse to take it to the extreme of saying rap music should be completely illegal. Get what I'm saying?
When we live in a country that goes bomb happy on our fellow human beings, killing thousands of civilians just because they don't look like us, act like us, or agree with us, abortion is one of the last things that should be on our mind.