No, I'm afraid, not at all

:o I'm sorry.
It seems like you're describing a number of cliques, or clubs, or allegiances. Another allegiance might be "OK", but it's not our "custom" to talk to each other.
I'm sorry. To me, what you describe seems like a very man-made tradition. Almost like a historical feud, that none of the present-day members have reason to be part of. In the Bible, everyone who is saved is in communion with each other. There were no sub-groups among true believers.
Thanks Melissa, you've done an excellent job of explaining it

I was previously confused because people were using the phrase "being in communion" to mean "being in unity with" in a rather abstract way, and I didn't know what it actually
meant for everyday lives. What you're saying is, it would be wrong to take communion in a church of a different denomination, because taking communion is an act of identifying yourself with that particular church. (Whereas I'd say the act of taking communion is one of remembrance in my own heart, which can be done together with believers of all different sorts... but that's me

)
I know

And I actually really support Kirk's attitude. His advocation of his beliefs are a sign that he:
a) Really truly believes them, and
b) Cares for other people enough to try to convince them.
However I was merely questioning the
basis for his beliefs
I dunno... I kind of get what you're saying. But it seems to me like a lot of man-made distinctions and customs. Levels of closeness, for example.
I guess, to condense what you say into a single sentence, would I be right in saying, "You'd only take communion with people who believe exactly the same things, even if they're not essential for salvation."?
Yep, according to Romans

We're supposed to be able to figure it out by looking at nature. But most of us can't do that, so the Bible is a huge help