Any song that highlights abortion in such a way as to increase opposition to it is a yet another blow against the rights of women, no matter how nice the chap who's singing it or how sweetly-emotional the approach of the lyrics (the inclusion of the word "innocents" alone is more than enough to betray their tendentious character).   He is severely misguided if he thinks it's a suitable song topic for a general audience. So, if it were me, I'd ask him just to avoid singing it.