Unbelief is a CHOICE to disagree with and reject the written testimony of God (aka the Holy Bible). A person can demonstrate unbelief against God with their words, actions, or both.
Unbelief blocks or refuses to love people with “God’s love”. Therefore, God hates the sin of UNBELIEF above all! UNBELIEF IS A CHOICE. (Hebrews Chapter 4, Matthew 13:58, Mark 16:14, James 5:20).