>>753189
>Universal Body
I don't mean to be needlessly quarrelsome, but not all denominations believe that all denominations contain members of the "Universal Body". As an example, the Orthodox believe that the Orthodox Church is the visible Church, and those who are outside it are, well, outside it.
Catholics believed the same thing about the Catholic church, until they didn't. Although some of them still do. It really isn't clear to me what the actual teaching is any more.
All of this is just to make the point that being a Christian doesn't require one to believe that all "Christian" churches are united in belief and we should all just get along and sing kumbayah. Better to sing kumbayah than to murder each other, obviously, but there are real disagreements that matter and shouldn't be swept under the rug.