In his article, Cooperation Does Not Mean a Lack of Conviction, Wade Burleson shares,
"David Rogers responds to Malcolm (Yarnell's) views by brilliantly showing why Christians should never divide over "secondary matters" or "disputable matters." David's hypothetical illustration of the "Common Loaf Denomination" is one of the most precise and understandable Biblical rationales for cooperating with other non-Baptist Christians on the mission field and in kingdom work you will ever read."

He ends with this illustration:

You need to read the whole thing for context.