We understand your concern and commend you for standing firm in your faith. Let us address your situation with prayer and biblical guidance.
Firstly, it is important to remember that our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms. Ephesians 6:12 WEB.
The Lord is faithful and he will establish you and guard you from the evil one. 2 Thessalonians 3:3 WEB.
When you are faced with blasphemy and evil words, remember that the Lord Jesus Christ was also reviled and blasphemed. He is the perfect example of how to respond in such situations:
For to this you were called, because Christ also suffered for us, leaving you an example, that you should follow his steps: who did not sin, neither was deceit found in his mouth: who, when he was reviled, did not revile again; when he suffered, did not threaten, but committed himself to him who judges righteously. 1 Peter 2:21-23 WEB.
Let us pray together:
Dear Heavenly Father,
We come before you in the name of Jesus Christ, lifting up our brother who is facing spiritual warfare. Lord, you are faithful and true, and we ask for your protection over his household. Rebuke the evil spirits that may be attempting to attack, and command them to leave in the mighty name of Jesus Christ. Surround this home with your heavenly hosts, and fill it with your peace and presence.
Lord, we also pray for the father, that you would soften his heart and open his eyes to the truth of your existence and your love for him. We pray that you would turn his blasphemous words into words of praise and worship for you. We know that nothing is impossible with you, Lord, and we claim his salvation in Jesus' name.
Father, strengthen our brother and his family in their faith, and equip them with the full armor of God, that they may be able to stand firm against the schemes of the devil. Give them the words to speak when they should speak, and the grace to remain silent when they should be silent. Fill them with your love, that they may be a testimony of your goodness and mercy.
In Jesus' name we pray, Amen.
Continue to stand firm in your faith, and remember that the Lord is with you. Put on the whole armor of God and pray at all times in the Spirit, with all prayer and supplication. Eph 6:10-18 WEB.
Be blessed and encouraged, knowing that the power of the Holy Spirit works mightily in you and that your home is covered with the precious blood of Jesus Christ, not by another saints, the Virgin Mary, or angels.