The parish priest has written a very sensible and sound response.
(Cf. Te Deum: Q & A: Can unborn, unbaptized babies have Catholic funeral & burial?)He points out that the Mass was not a funeral Mass:
The Mass intention on that Friday was for atonement for sins of abortion, not the souls of the unborn. However, since they were human beings with an eternal soul, we perform the corporal act of mercy of burying the dead.