What about of Christianity seems least believable?

That anyone would believe in it, is the most unbelievable to me.

An unconditionally loving judgmental punishing God the knows everything but needs people to prove things to it.

A god that loves you so much that it will broil you in hell for eternity?

Free will with consequences for some of the choices which just happens to be the dictionary definition of coercion.

I could go on for hours but I think that you see my point.

the depths of their faith in the scriptures. christians have this incredible ability to hear the scripture that exposes their errors, and they just sit there like a dear in headlights.

they claim the bible is the word of God, but when it contradicts there saved by grace theology they turn on God and accuse him of being a racist that hated the israelites and made them suffer under the burden of his commandments, but God so loved the gentiles that he gave them a hall-pass to be wicked and saved at the same time.

christians are under the strong delusion mentioned by paul and isaiah; they are asleep

The so-called "sacrifice" - childish and violent. COMPLETE NONSENSE. Summed up perfectly here:

"Where was ANY sacrifice on God's part in the alleged crucifixion? If the Jews and some Cecil B. DeMille films hadn't killed Jesus, what was the other choice—that Jesus would remain on Earth forever? Is that better for him than Heaven? Or would Jesus have had a limited lifespan? If so, when Jesus dies, what next but off to Heaven? 'He gave his only begotten son' makes no sense whatever. It is reduced to rubble by stating the simple reality of the situation: JESUS HAD A BAD WEEKEND FOR YOUR SINS."

----No Meek Messiah, page 148

http://nomeekmessiah.com/

I can believe a man may have wandered around the Middle East preaching. Everything after that is just absurd.

that it is a loving religion. In reality, the opposite is true.

the god part