Romans 3
The Jews were entrusted with the words of God. They have the revelation of God. However, some were unfaithful and unbelieving, but that does not nullify God's truthfulness or faithfulness.
We at times would like to blame God for the sins we commit. Some might say, I know, my futile thinking has been there, since God created us, therefore he must not be perfect. That is a very human and limited perspective.
Some even go the extra step of justifying their sins as a tool to help others see the power of God. Now if that is not a human perspective, I do not know what is.
Sin brings death, while Godly righteous repentance away from sin brings life. Therefore sinning on purpose does not get you closer to God nor letting others see God's mighty power.
As Paul continues, as much as Jews were the chosen ones, God has allowed gentiles into his love as well. Therefore, we are all alike and sin now separates us from God.
v23-24 "for all have sinned and fall short of the glory of God, and are justified freely by his grace through the redemption that came by Christ Jesus."
Ultimately, there is one God, and we are all under his mercy and grace.
