This may be cynicism on my part, but I read this as an admission that the LibDems will not win the election, and are trying to maximise their vote. No-one who actually wants to leave will vote for them anyway, so they have nothing to lose by positioning themselves as far to the pro-European extreme as possible, and scooping up votes that would otherwise go to Labour. I agree with you about the anger that would be stirred up if it came to implementing this, and conclude that even Jo SWinson doesn't expect it to happen. (For what it's worth, I'm not convinced that a second referendum would assuage that anger).

Oh, dear...