This is the blindness that nonbelievers experience when confronted with the truth of the Bible. They cannot properly understand it. He is very stuck on Leviticus because it strictly denies his desire as just. He is lashing out randomly at parts of the Bible when all he needs to do at this point is to believe on Jesus for his salvation. Then he would have a proper spirit to understand what he read. He, and indeed everyone, is condemned by the laws of God, but our sins are paid for by Jesus Christ. Eternal life is through Him.
Romans 10:9,10 “…If you confess with your mouth Jesus as Lord, and believe in your heart that God raised Jesus from the dead, you shall be saved; for with the heart man believes, resulting in righteousness, and with the mouth he confesses, resulting in salvation.”
Dan Savage mocks what he doesn’t understand, and makes the way more difficult for those children to have saving faith. I am proud of those in the video who walked out. Hopefully one day Dan Savage will see the truth before it is too late.