Read: Luke 10
Marked: Luke 10:16, “He who hears you hears Me, he who rejects you rejects Me, and he who rejects Me rejects Him who sent Me.”
Some say they believe in God but reject Jesus. As a Christian I am not ashamed of the gospel (the Good News) of Christ because it is the power of God to salvation (Romans 1:16).
If someone rejects the message of salvation in Jesus, they are rejecting God. Even if they profess faith in God, when they reject Jesus, the reject God who sent Him.