The way you were acting towards Earth trying to protect it from mankind, interfering in matters which were none of your business matters which should rightfully be decided by humanity itself!
"Are we only to watch over them? When I was invited here, I thought I would learn justice from you. But is the gods' 'justice' purely watching others?!"
—Zamasu to Gowasu, Dragon Ball Super
Every world is defined by its particular boundaries, within which some understanding of reality emerges as truth. Two truths cannot coexist, and so from the introduction of foreign bodies is conflict and chaos spawns. Thats why we limit our involvement in local affairs.