Everybody can (and should) say that abortion and any other killing of an innocent person is a damnable sin. Anyone who commits this grave, mortal sin knowingly and willingly, and does not repent, is fit for hell.
This is a terrifying truth.
But nobody should say that Kermit Gosnell or Tamerlan Tsarnaev or Josef Stalin or anybody else by name is in hell or definitely going to hell. Because we cannot know the inner state of their souls.
That's why we pray for Gosnell and Tsarnaev and all murderers living and dead.
As recommended by the Angel of Fatima:
"O my Jesus, forgive us our sins,
Save us from the fires of hell.
Lead all souls to heaven,
Especially those most in need of Thy mercy."
I have never interpreted the Fatima Prayer as referring to those most grievous (and serial) sinners who wantonly and irrevocably chose to implement the devil’s most grievous intentions while on earth...true agents of Satan...no more capable of genuine repentance than is Lucifer himself. To say that they are — other than solely out of a fear of eternal punishment — sounds like bleeding-heart wishful thinking to me. Gosnell and others on your list essentially passed through the one-way gateway to hell while still living and breathing on this earth.