It's because they're rabidly anti-Christian. Most of the pro abortionists are Jews, and Jews hate Christ and Christians. Do you know where the term kike came from? It was from jewish immigrants that refused to sign their name next to the "x" on documents, as it looks too much like the Christian cross. So instead, they signed their name next to a circle, which in Yiddish is called "kikel". Furthermore, jews invented the terms BCE (before common era) and CE (common era) to avoid having to say BC (before Christ) and AD (anno domini, latin for "in the year of our lord"). Moreso, jews also use different symbols for addition and multiplication in math. Can you imagine a people that petty and hateful? Why would they hate Christ so much? Well, partly because the Talmud teaches them to. Go check out what the Talmud says about Christ. They're pretty much modern day Pharisees.