Because ... why?
I would encourage you to look very closely at that statement. Doesn't it make you just the least bit uncomfortable?
When you say "true unity" ... unity in what?
What is preventing this "unity" of which you speak? What does "unity" look like? Whose fault is it that you will never have "true unity?"
I've found through hard experience that wherever I'm most sure about my position, that's precisely where I need to work hardest on amending my errors.
Pridefulness has always been one of my biggest problems. Perhaps I'm not alone in that.
What is The Gospel that unites?
The Gospel of the Grace of God
The Gospel of the Kingdom is what is taught and believed by Catholics.
They are NOT the same Gospel. They are poles apart. And hence, the reason WE are poles apart.
Jesus told us there would be other Jesus’s friend.. and there are many ...Our doctrine informs who Jesus is..