Why did roman and carthage become moratal enemies

There after Rome waged similar wars vs the Celts in Gaul and other parts of ... of the Mediterranean should come into mortal conflict was inevitable ... Carthage well knew that should a powerful enemy ever land an army on ...

Rome and Carthage became mortal enemies for the same reasons that most all of the ancient world were enemies---power. Whoever had the most power controlled the trade and resources of the area.