I think it is wrong to have divisions in the body of Christ. As said, we should all be working together for the one body of Christ. Wouldn't you agree?
1. I don't believe there are any divisions in the body of Christ. I believe it was/is/ever will be ONE, holy, catholic communion of saints.
2. I think that community is a GOOD thing (although not mandated) - thus I gather with other Christians in a given place in what is technically regarded as a "congregation." There are several of these mentioned in the Bible, there are millions of them today. People - usually Christian people - congregating for the purposes of worship, mutual edification, cooperating, support, accountability, etc. I think this is good (but I don't condemn that Christain who chooses to live out his faith in isolation as a noncongregatinal Christian. In the same way, there are congregations that choose to be in community with other congregations in what is technically called a denomination. They do so for the purposes of mutual cooperation, support and accountability. I think it good. I don't think it is required, I don't condemn the nondenominational congregation that insists on being in complete isolation from all others, but I personally regard a denominational one as having a blessing.
3. Should ALL Christians fully agree in ALL matters of faith, life and practice? Probably..... It's never been the case and I doubt ever will be - but it seems like a nice goal. I just don't see this as the same issue as our institutions.
MY half cent.