It is a bit more than a numbers game. Slaugtering those actually on this mortal coil because of whom they are, is a bit different than the issue of the legal right of a mother to abort her own fetus. Having said that, I abhor late term abortions, but that to equate that to the systematic genocide of an ethnic group, via state power, against their will, at the point of a gun, is really quite an evil equating really. As I said, I find it profoundly offensive.
The only way you can find it offensive is if you deny the humanity of the unborn.
Which is how these things get accomplished...by denying their humanity.
Can you at least see that if one does believe that the unborn are fully human, the tragedy is just as real?
Sadly you find infanticide to be somehow different from the genocide that it is. Nonetheless, the slaughter of the innocent, whether because they are Jews or simply unwanted babies is morally the same, no matter your offense.