I think the problem with saying "Christianity is X" is that there are so many different, let's say interpretations, of "Christianity", that it's going to be hard to pin any specific thing on it.
There'll always be someone who comes along and says: "I'm a Christian, and I believe no such thing!".
As such, an attempt to prove that "Christianity" is amoral is futile. The best one can hope to achieve is that
some forms of Christianity are amoral.
For instance your list:
1 - Devine atonement for Sin is a moral loop hole.
There are Cristians who agree with this. Claiming that god will save according to your actions, not according to your prayers or beliefs.
2 - Heaven and Hell are Unjust.
There are Christians who claim there is no "hell", meaning a place of eternal torture / torment.
3 - Vicarious Redemption.
See my comments on your first point.
4 - Freedom of Choice.
Again, see comment on your first point.
5 - Original Sin and Sins of the Father.
There are Christians who don't believe in these things.
6 - Thought Crimes.
Again, some Christians will claim that thought crimes are not how their god works.
As you can see, the problem is not so much that there aren't any Christians that believe the specific things that you mentioned, the problem is that not
all of them do so. Making a generalising statement like "Christianity is morally bankrupt" kinda hard to justify. In my oppinion it's better to say "some things some Christians believe are morally bankrupt". The problem with that however, is that even Christians among themselves will never agree on what those things are. Ask Faith what she considers morally bankrupt views held by Christians, and she'll cite the right to gay marriage (for example, if she even considers people holding those views to be Christian at all), ask Jar, and you'll get a completely different answer.