Convince characters, proud daughters and sons of the world or heaven blessed main characters that they do not need their weird and redundant religions.
What they need is sillyism.
The powerful religion that brings upon the silliest part of you and in return. The silly God shall reward the most silliest of them all with divine power, rewards and blessings that no God can even come close to.
After all, the silliest God is also the strongest and oldest of them all.