If you kill 60% civilians and children, and the population is 75% civilians and children and the enemy is literally using them as human shields, you're showing that you're doing at least something to minimize the harm. Anyone with a heart should be furious that this is the way that Hamas has decided to fight. Anyone with a heart should be furious that they attacked over a thousand civilians to pop off this latest round of violence. It sure made the Israelis furious, that's why they're retaliating.
There's no such thing as a war with 0 civilian casualties anymore. This isn't the 1600s where people lined up for battles in nice lines. So every war is a genocide by your definition. Unfortunately they're still going to happen because the world isn't all rainbows and unicorns.
Civilian casualties are both real people and statistics. Again, the world isn't all rainbows.