Sorry, I have no heart for anyone including God who let or make the people suffer or kill them for their rejection. Worst is children and newborns.
To me, if anyone choose to faith differently or beleive differently then let them... instead of make them to faith or beleive in God.
First of all God is the Creator of all things, God does not have to explain any of His actions to any of us. Look at Job for example, he had so many bad things happened to him, what did he do? He remain faithful to God no matter what, even he did not know that it was Satan doing all along, still he did not questioned God. We suffer in this life along with wicked, along with Satan's tempts. All the Natural disasters, accidents, sickness, poor, young and old, good or bad, even death will come to everyone, These things are a part of the lives of all who live on this earth, because of that this world is a sinful world, instead of blaming God for being cruel, Look at your own life, and look at the world all around you. God did not made this world when He created it. Yes, God allows Satan to roam on earth, we have the power to choose between right and wrong.
We need to have as much patience as Job did. We must learn to endure the hardships of life, instead of blaming it on God. God did none of the wicked that happened on this earth. It's the people, It's Satan, and It's what life was given to us the moment Adam and Eve did their first sin. This is what we get, this is what we have. We have to fight our own life, by doing what's right, and yes life is gonna get tough before it gets better, and God will reward us for all that we have given by keeping our faith in Him.