is there a reason as for why malenia and radahn fought in elden ring?

The specific reason for the conflict between Malenia and Radahn in Elden Ring is not explicitly stated in the game. However, it can be inferred that their feud may have originated from their differing beliefs, goals, or ambitions within the world of Elden Ring. It is also possible that their conflict may be rooted in personal grudges, past betrayals, or power struggles. Ultimately, the true reason for their confrontation may be left open to interpretation by the players.