>>> The Catholics seem to want all other denominations under the banner and authority of the Catholic church. That may happen <<Not true at all.That was the situation for the first millennia of Christianity, from 33 A.D. to 1054 A.D. or so
There were no Catholics or Catholic church back then, except through history being re written some time after the Catholic church began around 325AD
Christians back then, and now also, are under the "banner" of God through Jesus Christ and the Holy Spirit.
The church is made up of all born again saved Christians who have that personal relationship with Jesus as he promised in the NT. There are Catholics in His church, the ones that are born again and fit the other criteria noted above.
Christians have no need or desire to be squished under the banner and authority of the Catholic church.
The only rewritten history is on your part, if you can produce any evidence that the Catholic Church was "created" around 325 A.D., you are welcome to present it. Christianity wasn't legalized until 313 A.D., so I doubt they advertised themselves publicly, but certainly the Catholic Church was well established and referenced by prominent Christians before that time. Ignatius of Antioch wrote a letter around 107 A.D "addressed to all the congregations of the Holy Catholic Church in every place", the idea that the Catholic Church didn't exist yet would have certainly been a shock to him.
Even if we go by your revisionist date, you still acknowledge that Christianity was wholly under the banner of the Catholic Church from 325 A.D. to 1054 A.D. If you name any other Christian denominations around back then besides Catholics, please let me know. Jesus told Peter that HE would be the rock upon which the church was built. That was the case for hundreds of years, until other Christians broke away from that communion.
Nice to know there are Catholics in "His church", but I've never met any "born again" Catholics since that's a wholly protestant doctrine and is only mentioned once in the Bible (John 3:3-5). Catholics are Baptized at birth unless they convert from another denomination or religion. Having a "personal relationship with Jesus" is certainly a good thing, but it is not a requirement for baptism in the Catholic Church. Your definition of "the church" and "Christians" seems to be limited to fundamentalist evangelical protestants who "have a personal relationship with Jesus", unfortunately. They actually represent a VERY small segment of Christianity worldwide (maybe 10% of Christians at best, considering there are 1.2 billion Catholics, about 300 million Orthdox, and millions of other protestants worldwide who accept Jesus as their savior and have not been "Born Again" but were baptized at birth)