It sounds like your friend doesn’t want answers; he just wants to speak his mind. Maybe this is a case of “casting your pearls before swine” (Matthew 7:6). Father William Most gives a good explanation of this verse in his commentary on Matthew 7:6:
7:6:
Cast not your pearls before swine. Pearls were considered the most precious of all things, cf. Pliny Sr. Natural History 9. 34. 106. The original sense probably meant not to teach indisposed or even hostile people some points of doctrine. The Didache 9. 5. applied this to excluding nonchristians from receiving the Holy Eucharist. St. Cyprian – very unecumenical of him! – used this on Demetrianus (Against Demetrianus 1), who, said Cyprian, came not to him not to learn but to ridicule and charge Christians with the responsibility for recent calamities. The verse also perhaps was the basis of the Discipline of the Secret which held back certain doctrines until the candidates were ready for Baptism. In the persecution of Diocletian, many Christians died rather than hand over the Scriptures to the pagans.
Click
here for commentary.
I suggest you be honest with your friend about this situation. Arrange to meet privately with him to discuss your concerns and find a resolution to the problem. Pray and ask the Holy Spirit for wisdom and guidance. He will lead you.
When you meet, start out positive by telling him how much you like answering his questions (include other positives), then spend some time discussing the problem. This should start a good dialogue. The next step would be to discuss a solution to the problem. But, before you offer a solution to the problem, ask your friend for (name removed by moderator)ut. I’m sure he’ll like that

. If he’s a good friend, he’ll want to make things right. God bless you!
Prayer to Holy Spirit:
Come Holy Spirit, and fill the hearts of your faithful, and kindle in them the fire of your love. Send forth your Spirit and they shall be created, and you shall renew the face of the earth. Oh God, who by the light of the Holy Spirit instructed the hearts of the faithful, grant, that by the same Spirit we may be truly wise and ever rejoice in his consolation. I ask this through Christ our Lord. Amen.
Recommended reading:
Handbook of Christian Apologetics
By Peter Kreeft and Ronald K. Tacelli
To order go
here.
Pocket Handbook of Christian Apologetics
To order go
here.
Miracles
By C.S. Lewis
Click
here.
*Mere Christianity *
By C.S. Lewis
Click
here.