In the movie, The Blues Brothers, Jake and Elwood Blues are on a mission from {$God}. They pull into a joint and ask, "what kind of music do you play here?" The gal behind the bar answers: "both kinds, country and western."

Antecedent to the question of "what sectarian is" is, "what is the whole?" If you suppose that the whole is Xtianity, then you would proceed along the lines that many Xtians will use: "everyone rests on sunday," "bla bla true meaning of Xmas", "good people don't smoke pot." They don't claim that their fundamental beliefs are logical. One thing that is something I'm trying to build a bridge of understanding over is how they seem to have a creedo of "It's not ______ when applied to Xtians."

But let's try logic. For those of you who have seen me show up with problems in logic that baffle me, you will know that I present here with what I don't understand.

Is not the contrapositive Xtian implies sectarian? If a whole is to address a pie at least as large as the abrahamic religions, then I think soonix would agree with me that we have at least 3 abrahamic religions in judaism, islam, and xtianism. Would you agree with me that if people on this list were invited to pray together, then the "sectarian" differences are the ones among factions? In this setting, the lord's prayer would most definitely be "sectarian." Meanwhile, a prayer which addressed a monotheistic Dude would be "non-sectarian."

There's triple negation in "non-sectarian" doesn't mean "non-christian". So even for us Perlers, who are apt in formal logic, it is difficult to talk about contrapositives and/or opposities :-)

Perhaps for a part of your point, an answer is in my second reply (first half).