Messianic should be "evangelical." As should most independent churches and Churches of Christ.
"Other christian" - should be LDS, 7 Day Advent, Jehovah's Witness....basically, sectarian movements as distinguished from classical Christianity.
Other Christian?
Lump 7th Day Adventists with damnable heresies?
Your suggesstion, if followed, would lead to endless disputes.
But then, that's what goes on in a lively forum, eh?