"If God really exists then this wouldn't have happen."
Yeah, I've heard that a few times before. I usually don't say anything whenever someone states their reason for being an atheist. I mean, there was a period in my life that I was an atheist I just think that they'll figure it out someday that He does exists.
Here is my response to the first statement:
Gold is tested in fire. God is testing our faith in him.
And the only way to do that is through really bad times to see how strong our faith are. Look at Job, he had a lot of blessings; wealth, family and health. Even after God let all the bad things happen to him, all he did was hold onto Him stronger.
Here's the thing. Our stay here on earth is a pilgrimage. We're not going to stay here forever.
I don't know if any atheist would read this, but if you are, I'd like to apologize on behalf of the theists who attacked you in any sort. I think that they're doing that is because it is "insulting" the way you lay out the "evidence" that you think proves that He doesn't exists and how you mock us by the way we are worshiping him. God is our hero, how would you like it if someone who you holds very dear to your heart and/or your hero insults them?
I don't really get offended, I mean, that's how you feel and how can I stop you from feeling anything?
How would you respond to the atheist's statement? Why do bad things happen? How can we be loving toward our atheist friends and family while still explaining the purpose of God?