Some have trouble with God's love especially when they face difficulties.
I supposed the greatest president of U.S. have something to say about this, to paraphrase Lincoln:
Are you sure it is that you are on God's side? or that God is on your side?
We all know God does not love every humans in the world. As stated in the Bible: God does not hear sinners (John 9:31), "I pray for them, I pray not for the world (John 17:9) The grace is sufficient for all, but efficient for only the elects. Who are the elects? We don't know all of them, we cannot measure anyone else's true heart except that we ernestly check our own with a seeking and yet fearing heart towards God, our Creator.