Is that a rhetorical question or one directed to me? If the latter, the answer is not at all. He's not my Pope.
Let's not pretend that differences and problems related to doctrine and interpretation and application of scripture is a "mainly Catholic" problem. You marginalize the differences between the 35K+ Protestant denominations. I would differ. The fact that there are 35K+ Protestant denominations speaks for itself.
The sad fact is that there is division across Christendom. I contend that the source of these divisions is not the scripture but how men and denominations interpret and apply scripture. I wish I knew how all Christians can be one as Christ and His Father are one, but I'd be a liar to make such a claim. Hopefully, Jesus' prayer will be answered this side of heaven.
Despite the division between Believers, I choose that division will not divorce me from fellowship with other Believers. By Believers, I mean those who Believe that Jesus is the Christ and that through His life, death (sacrifice) and resurrection, we are saved from hell and promised eternal life in heaven.
You’re not Catholic?
I applaud your ecumentalism here, but how do you fellowship with those who adhere to a LOT more 'doctrine' than what you've written here?
Another point left out is that all believers are under attacks from the evil spirits in rebellion to God.
And nothing (except lazy thinking) requires that the devil use the same attack on two different people, churches, or denominations.