We had this discussion before. Life on Earth is for spiritual growth and preparation for the afterlife. Growing in oneness with Allah. We each have our own unique test.
In the Quran, Allah is given many names. The most merciful, the most compassionate, etc. To be one with Allah you have to pursue mercy and compassion etc. Without the human condition of suffering how are any of us to grow in compassion? Without inequality how are any of us to grow in mercy?
You imply since Allah gave us free will that it’s Allahs will to spread blood and corruption. Free will is part of the spiritual growth. Without free will how do any of us grow spiritual?
Those who suffer in Gaza, that maintain steadfastness, will have their reward.