You seem to have this idea that people pick up the Bible, read "Jesus walked on water", and go "Wow, praise God!" In actuality, what matters isn't the claims the Bible makes, but the actual words that Jesus and the prophets speak. These words are packed with timeless superhuman wisdom, sort of like ancient Greek philosophers except on steroids. A sincere Christian wrestles with God and with the scriptures.

"The seed sown on rocky ground is the one who hears the word and at once receives it with joy. But since he has no root, he remains for only a season. When trouble or persecution comes because of the word, he quickly falls away." (Matthew 13:20-21)