The people who proclaim the God of Abraham as Creator should be united as they are described in Acts 2 as being in one accord but they are not. People band together in groups not based on Scripture but on their interpretation and tradition and yet each claim they believe. John 7:16, ““My teaching is not My own,” Jesus replied. “It comes from Him who sent Me.” It is not the word of our Creator that divides us, it is tradition and rejection of His word.
This year has been particularly ludicrous with the calendar issues. Here's a place to start if you're wondering why so many of us stick with the Jewish reckoning. It includes a legitimate reference to how the present calendar came to be and why.
https://firstcenturychristiani....ty.net/explaining-th