Christianity: God sacrificed himself to himself to appease himself and therefore save humanity from himself. makes sense?

That pretty much sums up the base theology of Christianity except you left out why he had to save humanity from himself. He gave them a rigged test and when the flawed creatures he created failed he got mad at them.

This stupid lie is posted too many times to count, and it's all based on lies, and only someone who actually hates God would say something this ignorant!

1. YOU break the law, YOU go to jail. Is THAT too difficult for you? (I'm guessing it probably is!)

2. YOU have a fine, and some one ELSE offers to pay. (That's also too complex for a simple-mind to grasp).

Now, let's try to put together these two complicated concepts:

1. YOU broke God's Law, and YOU deserve the penalty.

2. God sacrificed Himself on YOUR behalf to pay the penalty so YOU wouldn't have to.

You have spurned God's mercy, and yet He continues to offer you an undeserved and unmerited pardon for the sins YOU have committed.

If you don't want God's mercy and forgiveness, that's your choice, but quit blaming God for the consequences of YOUR hateful choices! If you want someone to blame, go look in a mirror!

According to trinitarians God also prayed to himself in the garden at Gethsamne and talked himself on the cross.

No, that doesn't make sense (not from the position of your god).

Perhaps you should adopt Christianity in place of your current belief in a nonsensical god.

No, it makes no sense, and, that is not how things work anyway, at least, not in Christianity. Atheist love to mock Christianity by saying it, but, it just demonstrates their lack of understanding. Pity.

That is a caricature of a particular understanding of the Atonement in Christianity called Penal Substitution. Let me basically do a theology 101 for you. There are three basic formulas of the Atonement(why Christ had to die) in Christianity. (i)Moral Influence view of the Atonement. (ii) The Classical view of the atonement. (iii) The Scholastic(Substitutionary view).

What you are critiquing is a particular interpretation of the Substitutionary(Scholastic) view of the Atonement developed by John Calvin and popularized by Conservative Evangelicals called Penal Substitution. Basically Christ died to appease God's Wrath. This view of the Atonement was by and large developed in the 1500s and not all branches of Christianity subscribe to it(especially since for the first 1500 years it didn't exist). Other atonement theories like the Classical view(Christus Victor/Ransom). See's Jesus's death as an act of liberation. Essentially we are enslaved to the power of sin and death(which manifests itself in the forms of evil, hatred, violence, injustice, oppression, etc). These signs and symbols of sin manifests themselves in Jesus's passion and crucifiction when he is crucified by the cruelty and injustice of the world. But through his resurrection he conquers the evil and injustice of the world thereby acting as a sign post for a time when God himself excercises his justice against the injustice, violence, hatred, oppression(i.e sin) of the world. So this view of the atonement views salvation as a form of liberation that hearken's back to the Old Testament images of salvation when God liberates the Israelites from slavery in Egypt and liberates the Israelites from exile in Babylon.

The other view of the Atonement I mentioned, the Moral influence sees Jesus's death as a Moral example. So his death just like his life is the ultimate moral example we should live up too. In life he exemplified perfect Love which manifested itself in his Love for others and he dedication to peace and justice which were all signs and symbols of the Kingdom of Heaven. And in death he exemplifies this Love and devotion to peace and justice, even willing to lay down his life for the principles of peace, love and justice which are signs of the Kingdom of God and God's way of doing things.

So in short not every Christian sees Jesus's death as a cosmic human sacrifice to appease the wrath of an angry God.

*** Jesus was God's first creation why he said let us make man

(Colossians 1:15) He is the image of the invisible God, the firstborn of all creation;

Not really. That's why it's referred to as "faith."

Which is why the doctrine of substitutionary atonement didn't exist until the 11th century.

Yes actually. There is only ONE Conscious being in the universe experiencing many things at once. This singular universe expresses itself in an infinite array of possibilities.