Jesus set the principle “...whoever is not against you is for you.”
One person made that comment and finished with "because the Christian congregation had not yet been formed. Hence, it was not required that the man physically accompany Jesus."
Of course brother unforgiving, rigid, uber-elder popped up with, "Now that there is a congregation the only ones that can be for us are in the congregation, no matter how kind, or helpful they may be. If they are not part of the congregation they are against us!"