Someone explain this to me.

Johnson says Tory Brexiters would face deselection if they refused to back any deal he agreed
The Conservative Huw Merriman says, if the Tories are going to remove the whip from MPs who rebel tonight, will Johnson also remove the whip from any MPs who do not back any deal he does bring back to the Commons.

(Some of the hardline Brexiters in the European Research Group says, even with the removal of the backstop, they would still find the Brexit deal unacceptable.)

Johnson confirms this would happen. “What’s sauce for the goose is sauce for the gander,” he says.