Most haven't. Many have. Most of those that have just cherry pick the parts they care about.

The remainder that have read and understood it just compartmentalize the cognitive dissonance. They ignore that the being they profess their undying love for was an unemployed, unmarried vagrant that wandered around with his buddies, that spread philosophy and free food and medical care to strangers, that spoke out many times against the rich, the performatively religious, bigots, opportunists, violence, and retribution, that encouraged one to live a minimalist life, to humble yourself before your sick, poor, and foreign brother, to wash the feet of sinners, and that was an activist whose chosen forms of protest included flipping tables and chasing money changers from a temple with a whip. But no, I'm sure he wanted you to make sure gay people don't get married, or whatever.