this is my ultimate favourite George quote
I think this joke, and the routine it is extracted from, are misunderstood/misapplied. Carlin is not saying that we should have no concern for unborn children, he's saying we should take more steps to support children once they are born. This is not a binary issue.
Also, it's interesting (if you watch the whole routine) that at that time conservatives were wearing the "war monger" label, whereas today liberals support war just as much as conservatives. Also, this routine comes from a time when almost every politician and religious leader was a man. Thus, Carlin's quip that "conservatives hate women". Of course, today some of the most outspoken opponents of abortion are women, simply due to their increased prevalance as community leaders and spokespersons.