For clarity, I will specify that god, by Abrahamic terms, is the omnipotent, omniscient and omnipresent creator of everything. Oh, and he loves us all! Lets look at these in slightly more detail;
Omnipotent: All powerful, there is literally nothing that he is incapable of doing.
Omniscient: All knowing, he knows absolutely everything, always has and always will.
Omnipresent: He is everywhere, at all times.
Creator: he, and he alone planned, designed and created absolutely everything in existence.
All loving: Pretty much an obvious one, do I really need to clarify this?
Now, keeping these characteristics in mind, why is there suffering in the world?
Believers will often argue that suffering is caused by the actions of bad men acting under their god given free will. But I find two major issues with this argument.
1) What about the suffering caused, not by men, but by natural occurrences? (I will hopefully cover this in a separate post)
2)Why would an omniscient god purposely make people knowing they would use their free will to cause suffering?
Usually, they come back with some variant of "It's not god who causes evil, it's Satan" With which I have the following issues:
1) Why would an all knowing god knowingly create Satan?
2) Why would an all powerful god not do something to stop Satan from causing suffering to his most beloved creations?
Which in turn is usually met with either accusations of persecution, vitriolic hatred, a poor attempt at apologetics or is just ignored completely (often with any further attempts at communication being blocked!)
Whichever way you look at it, there is some pretty obvious conclusions the Abrahamic religions what you to ignore here.
An omniscient god must, by definition, have known every thought and act of every person that ever has lived or will live even before he began to create the universe.
If that is the case then he knows, way before he makes someone, if they're going to be a murderer or rapist or child abuser or *insert evildoer of choice* (regardless of whether they do so through free will or through satanic inspiration).
An omnipotent god must, by definition, have the power to choose whether or not to make that person.
If that is the case then every murderer, every rapist, every child abuser and every evildoer that has ever lived must have been knowingly and purposefully created by god. By anyone's standards that's one hell of a malevolent act for a god who claims to love us all!
But here's where it gets even more twisted. For each and every sinner there is the chance of redemption through repentence. Not just for those truly evil ones as described above but even for those of us who live noble and honest lives yet seem to get on his wick by not believing in him,falling in love with someone he decides is unacceptable, eating shellfish, shaving, not shaving or any of the myriad of petty little crap that he's willing to condemn his most beloved creations to eternal torture for.
As a side note, this means that god will happily allow an apologetic child abuser to share heaven with all you faithful believers, but will send an honest but unrepentant atheist to hell. Seems a bit backwards to me :/
But the darkest part of all this is that an omniscient, omnipotent god, by definition, would also know who will and who won't repent, and must have the power to decide whether or not to make them repent.
So basically god is knowingly and purposefully creating sinners, letting some of them cause suffering throughout the earth purely so he can send them to suffer eternal agony for doing the things he created them to do and for his failure to make them be repentant!
And so, here I return to my original point; the Abrahamic god, if he were real and as described by holy texts, would be a complete and utter douche. A malevolent, spiteful and sadistic bastard of the greatest magnitude and certainly not deserving of my (or anyone else's) praise and adoration!