I don't fully agree with him because I don't think we can fully explain where evil comes from or even really understand what having free will is like because we are born enslaved to sin and unable to make proper choices fully aligned with God's will - and we all start off that way.
5 Those who live according to the flesh have their minds set on what the flesh desires; but those who live in accordance with the Spirit have their minds set on what the Spirit desires. 6 The mind governed by the flesh is death, but the mind governed by the Spirit is life and peace. 7 The mind governed by the flesh is hostile to God; it does not submit to God’s law, nor can it do so. 8 Those who are in the realm of the flesh cannot please God.- Romans 8:5-8
Faithful Thinkers: Video: Misuse of Free Will