Fun fact: Just about every Republican believes this, because the terrible crimes committed don't justify murder, which is even worse.
That is just simply NOT true. First of all (as I linked below), 27% of Republicans are pro-choice, so obviously those people do not believe that. And according to a CNN poll (the second link, about half way down), 76% of Republicans think abortions should be legal "when the pregnancy was caused by rape or incest."
So yeah, you're just like completely wrong.
http://www.gallup.com/poll/170249/split-abortion-pro-choice-pro-life.aspxhttp://www.pollingreport.com/abortion.htm