"Jesus was into an institution called "The Church." "
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Whom do you believe that CHURCH is?
Is it one particular denomination, or is it the body of believers?
I think the Church is that body that is descended from the body that Jesus started:
They went from Jerusalem, to Judea, to Samaria, to the uttermost parts of the earth.
But they WERE NOT just anyone who decided to hang out a shingle with the words "First Church of the Stuff We Think Is Right."
A real church is both the spiritual descendants of the Early Christians and they are descended through the lineage of ordination.
If they can't demonstrate their connection to the early Church, then where is their authority? After all Jesus said that the Church would be unconquerable and that "the gates of hell would not prevail" against it.
Jesus also said to His Apostles: "those who are not against us are for us." when they complained once about "unauthorized" folks who were preaching about Him.
Therefore, any group of "spiritual descendents" will not reject those with an already established, traceable connection who have not apostacized and had their candlestick removed.
They will demonstrate unity.
Just my humble 2c worth.