The electorate votes for an MP. The members of a leaddership convention vote for a leader. Since the post is vague (intentional) and rife with inconsistancies, people make the assumption that you are talking to the 99% of the population that is not part of a "party"
Try to be specific and not nebulous when you post and thread. You can allows go back and correct your inconsitancies with the edit function
I found the OP quite clear. What was unclear was why non-members of the NDP should be consulted on who the party leader should be. I interpreted that to suggest that non-members of a political party should have a say in who the leader is, perhaps on the assumption that parties are public entities that belong to the people or some notion of the sort. In my opinion, they are purely private entities and how the leader of a party is picked is the business of the membership of the party and no one else's. He doesn't even have to be elected democratically, in fact. As long as political parties respect the law of the land, as private organizations, just like religious or other organizations, are free to choose their party leadership however the hell they want to.
Imagine if a post were put up asking what you look for in a Pope. It woud just seem strange in forum like Canadian Content that is not officially Catholic. After all, it's none of our business what virtues are sought for in the Pope unless we're Catholic ourselves. I'm not Catholic, so it's none of my business either. CanCon is not an officially New Democratic forum either, so why would we be debating what standards the NDP ought to have in choosing a leader.
That's just how I'd nderstood the OP.