Traditions, rituals and funerary practices must be respected.

Explanation

People who buried their dead with rituals and funerary practices did so with reverence for their dead. They wanted them to lie in peace, undisturbed. We must respect their sentiments.
OR
Against
People in ancient times had some beliefs and followed funerary rituals. By investigating into them we can know much about them. It adds to our knowledge about the progress of human civilization in different parts of the world.