I will try to answer your question to the best of my ability...

Throughout the Bible, you'll find accounts of innocent people who have gone through trials, torture, and death...people who were God's Children...people who others could have looked at and said, "They didn't deserve to be treated like that."

I believe that since God created us, and He knows what happens after we die, and he ultimately knows what is best in every situation, that there are some things we may not understand, but are perfectly within God's perfect plan.

I believe as the Bible says that God's ways are higher than our ways and his thoughts are higher than our thoughts. If he created us, gave life to us, I believe He knows in the end what is best for us. Even if we can't see beforehand how it is best for us.

In the very beginning, Cain killed his innocent brother Abel. God allowed this to happen, and He did not intervene.

We don't always know the reasons God allows things. But I do know one thing, God was watching, God kept record of this evil, and he held Cain accountable for the blood of his brother.

And now, Abel would have to be in Heaven.

There is also the story of Lazarus, which was a parable that Jesus used to make a point about life...
There was a rich man who had everything he needed in life, and there was a poor man, Lazarus, who was full of sores and laid at the rich mans' gate.
He wished to be fed, not even by much, just by the crumbs which fell from the rich man's table.
The rich man never helped lazarus, and Lazarus suffered his entire life. If this situation happened today, no doubt, we'd all be wondering, what did Lazarus do to deserve this kind of life?

What ended up happening in the parable?
The beggar died, and the rich man died. The rich man who had not helped Lazarus was punished, Lazarus was comforted for all of eternity.

When innocent little brother Joseph was sold into slavery by his bigger brothers who were jealous of his father's favoritism towards Joseph, God allowed this to happen.

Eventually this resulted in the salvation of thousands of people who would have otherwise died of starvation.

The blind man in the new testament, who had been blind since birth, the disciples asked Jesus, "Who sinned, this man, or his parents, that he was born blind?" Even the disciples couldn't understand why God lets these things happen to people. Jesus answered that the reason this man had been blind from birth was to manifest the Glory of God.
The man had gone through his entire life blind, for that very moment.

Job was a very good man, as you can see in the Bible.
Job's suffering, through losing his family, his livestock, his home, everything he knew as his.... was not something that we would consider "fair", however, God had a plan for it. It was through this suffering that God was able to reveal many truths to Job. He also used this to teach others about the faith of a man such as Job. Someone who had enough faith that in the midst of that much suffering, would still refuse to condemn God!

It was like the blind man's story...it was done to give glory to God.

Jesus death, it was not what we would consider fair. Jesus was an innocent man, who came to earth to help people...but he also had another purpose...to give us a way to atone for our sins. His death was cruel and viscious..... his body was so torn by the instruments of torture that the Bible states that he wasn't even recognizable as a man. He was made to carry his heavy cross after being cruelly tortured...his beard was ripped out...he was spit on, his hands and feet were nailed to a cross and he was hung there to die, and given vinegar to drink when he begged for a drink.

All of this was according to God's glory.

Why would God's son suffer and die for us, if God did not care about us?

According to the Bible, God is the potter, and we are the clay. He molds us according to His will.

"For who hath resisted his will? Nay, but who art thou, O man, that repliest against God? Shall the thing formed Say to him that formed it, Why hast thou made me thus? Hath not the potter power over the clay of the same lump, to make one vessel unto honor and another unto dishonor"

God uses the circumstances in our lives (whether He caused them to happen or not) to mold us into something that can be used according to His will.

I hope this has been somewhat helpful to you. I also used to have the same questions, and the way I was able to answer those questions was to actually search the Bible myself, instead of taking what people told me about the Bible, without actually seeing what it said for myself.

I read that if you "draw near to God, God will draw near to you". Try praying to God, and asking Him to show you the answers to your questions...then open your Bible and read...a good place to start is John, and the three Johns right before Jude and Revelation.