Unless Castro accepts Christ as his savior and puts his trust completely in him for salvation there is nothing the RCC can do to prevent him from going to hell.
Aunt Bea and Castro are the same, in God's eyes. Lost sinners, dead in their sins, and in need of Christ's finished work for their salvation. That is, according to God's Word. But not according to the Catholic Church. Aunt Bea could not POSSIBLY be in danger of going to hell. She's just....so GOOD...and Castro is obviously so BAD...
They stumble at the stumblingstone.
Jesus said to them again, Peace be with you. As the Father has sent me, even so I send you. And when he had said this, he breathed on them, and said to them, Receive the Holy Spirit. If you forgive the sins of any, they are forgiven; if you retain the sins of any, they are retained.