If God really exists and is not a figment of Man's imagination, then why are there diseases such as Ebola and AIDS. Why are humans so destructive and violent if made in Her/His image who is supposedly Loving and All-Knowing?
This is just destiny, God's testing us for how much we remember to care for him even in such situations! We are sent by God to this earth for an exam in which God sees if we have true love for him or not!
We are made in God's image, but we are not God.
Therefore we are not perfect. So we will wage war against each other, have to deal with deadly diseases, and other things such as world hunger and the like.
The world isn't perfect, and it isn't meant to be. The world is a trial, when you die you will be judged and you may make it to a world that IS perfect, where you ARE perfect.
Yours is an interesting question, but it does hinge on one or two premises which I disagree with. Firstly, your question naturally assumes that diseases such as Ebola and AIDS are inherently evil. This I disagree with - they are only perceived evil. Why do I say this? Humans don't describe illnesses that afflict other animals as evil, only those that we are affected by. This anthropocentric view of things can blind us from certain things. Diseases are a natural part of this world, unfortunate for us, but natural. They are as natural and devoid of intrinsic moral value as hurricanes or tsunamis. Think about it, a tornado that causes no harm to a human being would just be seen as a natural phenomenon, whereas one that directly causes loss of property and life will be viewed as an evil.
With regards to humans being made in the image of God, I agree with Ryan Hebel - we made in His image, but we are not God. What 'being made in the image of God' actually means is open to interpretation. Ultimately though, it is important to understand that humans have the potential for good. However, we also have a choice between good and evil, and many humans choose the latter.
But, one point stands out above all: You cannot make the existence of 'evil' in the world a condition for the existence of God. It's an argument based on many assumptions, such as that if God exists then the world should be perfect, that if God exists he should be constantly interfering in this world, that natural events are intrinsically good or bad, etc. In addition, if you remove God from the equation, you're left with an interesting conundrum in your train of thought: If evil exists, then God does not exist...but if God does not exist, then how do you define evil? Evil is, to all intents and purposes, the opposite of what we consider to be good, the latter being an objective concept which we link directly to God. What you would be left with is a view of the world where good and evil do not exist, that everything is subjective...a view which would render your question null, for Ebola and Aids, as well as the actions of humans, could not be considered evil.
In the end it boils down to what you consider to be good and evil, and how this relates to your idea of God. Also, it also boils down to your awareness of the concept of religion: Remember religion is but man's interpretation of the divine, and just as man is fallible, so is our interpretation.