"国家と教会の分離の目的は、ヨーロッパの土を何世紀にもわたり血で染めてきた絶え間ない争いを永遠にこの地から遠ざけることです。"

Simplified Meaning:

When they say we should keep the church and the government separate, they're trying to make sure that the fights and wars over religion that happened for a long time in Europe don't happen here. Imagine neighbors arguing about different beliefs and those arguments turning into big, violent fights; that's what they want to avoid. By keeping religion out of state decisions, everyone can follow their own beliefs without fear or fighting. Think about a classroom where students from various backgrounds and faiths attend; if the teacher treats everyone fairly without favoring one religion, the class runs smoothly, and everyone gets along better. If the teacher showed favoritism towards one belief, it might cause arguments and tension among the students. This idea helps our country stay peaceful by making sure the government doesn't get involved in religious matters. It's better for everyone because it prevents conflicts and ensures fairness.