God almighty has different and unique way of exposing His message to the world. Imam Husein (as) is the most unique and the only choice of the time to expose the world the message of Allah. The result is that Issah will come back and follow the son of Imam Husein.
Majority doesn’t mean that they are on the right way. In fact Quran says, few of my servant are grateful. The fact that millions do Easter doesn’t mean they are right.