Ok, so since you're a Christian, I'm guessing that you believe your god - described as omniscient, omnipotent and omnibenevolent - created the universe. A universe in which free-willed people like I, and countless other people from all walks of life, never choose to molest children, thereby causing them suffering.
Since it's presumably possible for such a god to create everyone with the same trait as I - the inability to molest children - you can only conclude that this god most desires the suffering of children that are molested.
What I believe about the way He created the world really is not based on any reliable knowledge, so I must admit it is all based on my imagination. However, since we agree that my perspective on the origins of the present state of the world is described in the book of Genesis, and that I draw conclusions about the truth based on that story, then I tend to view the origin of human civilisation in two most likely ways, according to that story:
1. Considering literal Gensis account of creation, mankind was plonked in paradise without any previous experience, and therefore did not have any idea that molesting children could even be desirable. This knowledge was discovered when he bagan to seek and obtain the knowledge of good and evil.
2. Considering that humankind has evolved from life as described by theories of evolition, over millions of years, at some point mankind began to know about good and evil, and has decided that it is evil to molest children. However, this does not imply that the desire was not experienced and acted on before the knowledge of good and evil was pursued.
I don't actually know which of these ideas is more accurate, so I tend to consider them both as being possible and equally plausible, yet do not commit to one over the other as the basis of my understanding. Hopefull this can help you to welcome my perspectives more, and to even check the reliability of our assumptions before you jump in with conclusions.
What I do know however, is that God probably does not desire the suffering of children, based on a simple linking of two statements made by Jesus, whom I consider to have always spoken truthfully, and thses words no less containing truth:
"For when you did it to the least of these, my brothers and sisters, you were doing it to me". "Depart from me, because when I was [suffering and needed your help] [you abandoned me]."
"How can you say that you have not already seen the father? Whoever has seen the son has seen the father!"
Therefore, Jesus expresses the will of God, that we should treat others as though we would want to be treated ourselves, and even appeals to our conscience whe He says we are treating Him when we treat others.
Therefore, no, I believe the desire to molest children is not a desire of God, but of someone who does not value the life of a child as they should.