Wait no longer. It already exists. You probably missed it because it goes by another name: Multicultural Inclusivism, and has many branches, but it's "Vatican" is called the UN, its Pope is called Secretary-General, and the current pope's name is Kofi Annan.
You'll be proud to know the United States supports this religion by helping to fund such subjectivist outreach programs as UNICEF and UNESCO, and even has its own UN sponsored program called No Child Left Behind, which promotes such noble subjectivist ideals as self-esteem, and terror of all guns.
Hank