I'm a Christian, and I hope my response is indicative of that.
Let's look at some definitions...(gathered online, and I believe them to be considered definitions accepted by society. Credit for the information is due someone other than me).
Murder: the unlawful premeditated killing of one human being by another.
Kill: to deprive of life : cause the death of.
Life: the ability to grow, change, etc., that separates plants and animals from things like water or rocks.
Exodus 20:13: Thou shalt not kill.
(to that I say, what could the scripture be referencing other than the killing of a human being?)
There is no logical reasoning that disputes the above comments, except perhaps my personal comment at the end. Three are definitions that are universally accepted. One is a scripture from the Bible. It's not about your opinion of the scripture or your acknowledgement or participation of/in faith of our Lord and Savior...it's about what is stated in the Bible, and it is indeed stated in the Bible, therefore it is a fact.
At this point in my post, it isn't about my opinion... it's about facts.
Now...my take (call it my opinion if you want to) on application of these facts with respect to the OP.
An elementary reading of the definition of life would bring a rational person to the conclusion that life begins at conception...no catalyst is needed after conception to cause growth, thereby defining a fetus as having life. Get over it... A fetus is a living being. It begins changing once conception takes place, and it doesn't stop changing EVER (until death of course, well that's another topic). By statement of that, abortion deprives life, causes death of (life)...therefore abortion is an act (or even method) of killing. Where do we draw the line and say it's acceptable to kill an unborn but LIVING being but isn't acceptable to kill a born human? Who are we to decide? We aren't anyone to decide. It's already been decided. God said not to do it, and that's clear. Therefore, abortion isn't ok. It is killing, it is a sin, and that's defined by facts. Not my opinion or anyone else's. But by the Books in the Bible.
Now then, people want to justify killing. Is there justification for it? In war? In self defense? Perhaps. Would it be sinful? I'm no Bible scholar, and I won't speak to that. I'm just a dude. In the cases of irresponsible sexual behavior that results in an unwanted pregnancy? Absolutely not. In cases of rape? No, but yea, that makes it sensitive to a different level. I get it. But we're all burdened with undesirable circumstances in life, and some catch it worse than others, and there's no explanation for it. As bad as we think we have it, we don't have to go far down the road to find circumstances that are more detestable than our own. As detestable as a situation like that is, it's not the topic. None of these circumstances are. It's about the definitions presented above and the relationship a Christian has with Christ.
When my time comes and I am faced with the question from God: "what did you do with that life I gave you son?" As a sinner, like we all are, and I attempt to be the best I can be and still suck at it, I hope my response is pleasing to the Lord, even though he will already know the answer. But here's what it comes down to regarding the OP: if I've in anyway supported abortion or supported someone who supports or promotes it, my response will not be pleasing to the Lord, and I'll have consequences to face.
I won't throw rocks at any Christan or anyone else regarding his or her behavior and whether or not it's Christ-like. I'm not the judge, and I have my own repeating sins to deal with. But I will NOT sit by and watch people try to justify killing babies and make it sound like it's OK. Because it ain't OK.
Find something else to fight for in our Country. WE'RE LOSING OUR COUNTRY, AND IT'S NOT BECAUSE KNOCKED UP CHICKS NEED ABORTIONS. Find a right that's worth fighting for and fight for it.
And whoever referenced killing severely malformed babies...God loves them. And so do the parents of them who were born.
Yes, this topic hits close to home.