"Básicamente se están matando entre ustedes para ver quién tiene el mejor amigo imaginario."

Simplified Meaning:

When people fight over religious beliefs, it's like arguing over whose invisible friend is better. Imagine if two kids both had make-believe friends and started fighting because they each thought their friend was the best. In real life, wars and conflicts often happen because groups believe their god or religion is the true one, even though you can't see or prove any of these gods. This fighting can hurt or kill people, even though the things they're fighting about can't be seen or touched. To avoid this, people should respect each other's beliefs and understand that it's okay for different people to think differently. Instead of fighting, focusing on kindness and understanding can help everyone live more peacefully.