Well to cherry pick the good out of Christianity it takes a dual mindset, or compartmentalization. You have to pretend that God really, really does get upset over gay people having sex, but then also pretend that he doesn't care if people eat shrimp or pork any more. Or, you have to pretend that you follow all of Jesus' teachings but get upset over having to pay more in taxes so some poor people can get welfare benefits.
Christian apologetics is the art of rolling a dog turd in sugar and selling it as a donut.