Contradiction with Acts 10:34
Acts 10:34 states that God does not show favoritism, whereas Revelation 5:9 implies that only specific people are redeemed by the Lamb's blood.
Acts 10:34: Then Peter opened [his] mouth, and said, Of a truth I perceive that God is no respecter of persons:
Contradiction with Matthew 15:24
Matthew 15:24 indicates that Jesus was sent only to the lost sheep of Israel, in contrast to Revelation 5:9 which speaks of redemption for people from every tribe, language, and nation.
Matthew 15:24: But he answered and said, I am not sent but unto the lost sheep of the house of Israel.
Contradiction with Matthew 10:5-6
Matthew 10:5-6 records Jesus commanding the disciples to avoid Gentiles and Samaritans and focus on Israel, contradicting the inclusivity of all nations in Revelation 5:9.
Matthew 10:5-6: These twelve Jesus sent forth, and commanded them, saying, Go not into the way of the Gentiles, and into [any] city of the Samaritans enter ye not:
Contradiction with Romans 2:11
Romans 2:11 emphasizes that there is no partiality with God, appearing to conflict with the specific selection criteria described in Revelation 5:9.
Romans 2:11: For there is no respect of persons with God.
Paradox #1
Revelation 5:9 is a verse that talks about Jesus being worthy to open a scroll because he was sacrificed and redeemed people from every tribe, language, people, and nation. A possible point of conflict or inconsistency might be with the idea of universal redemption versus particular election. Some theological interpretations emphasize that salvation is available to everyone (universal redemption), while others focus on the belief that only specific individuals (elected) are chosen for salvation. This could lead to debates on the scope of redemption as described in this verse.