Perhaps because Christianity rejects them.
Everyone will have particular teachings they dislike. The root problem, for me, is that western Christianity views God as a person with feelings and emotions, like a big toddler; who loves you if you do what it wants and hates you if you don't. You shall find salvation, if you just "believe" - seriously? Nobody can make themselves believe any more than you can make yourself love or respect someone you don't. You can 'fake' it though and there's a thought.
I personally believe Jesus did exist (Josephus mentions him). The Romans thought he was a trouble maker - perhaps some Jews did too, so he was crucified. What that means to me is that he only had three years to preach, which is a great shame, as we only know the tip of the iceberg.
Nothing wrong with love but many legalistic Christians are manipulative and judgemental. Not much love there - too many strings attached.
Sure, if you tell them that there is a super sentient being somewhere up there, they're going to expect you to produce evidence. The irony is, that some teachings in the Bible refute this notion; just that most Christians ignore those. Too abstract probably.
So basically you are saying that a Christian can never 'know' God and will always require belief and faith. This is odd, if you think about it. I don't "believe" there's a country called Spain, because I know there is; belief and faith are unnecessary when we know something exists. The problem is, the big Sky Man doesn't, so you're stuck with belief.