In Edict XII of Emperor Asoka we can see that Asoka values every faith and encourages each individual to respect all religions as it acts as a token of respect for his own faith.
Explanation:
Respecting all religions equally would lead to a harmonized society in the world where individual would not be fighting against each other in the name of faith while only trying to establish their own supremacy. This indeed supports the idea that Asoka was sincere about promoting the welfare of the whole world.
