Re: because that would require morals
You're right, only a few MPs would vote against their whip.
That leaves Labour and Lib Dems and a few others. Which would only need a few Tories to go against their whips.
But if enough Tories see it and realize it's true, they might have words with Amber behind the scenes. Point out to her what a truly stupid idea she has. Point out all the people who can be told of this video on youtube and realize what a stupid idea it is. Many of them her own constituents.
Still only a small chance of dissuading Rudd. But that's a lot better than doing nothing.