In reply to krikoman:
> Given the same situation, I might struggle to vote for what I perceive as a traitor to the party,
You're something of a Corbynista, though, aren't you?
I suspect the general electorate don't view the shenanigans in the Labour Party as the treachery that you see. They may see a shambles, but I doubt if many of them consider the anti-Corbyn members of the PLP to be 'traitors'.
They just see the Labour Party in a mess, and don't think they're currently worth voting for, no matter what candidate was put forward.
It's worth remembering, once again, that the vast majority of the electorate are not members of any political party.