One could argue this is already backfiring. Quite a few people in this thread who don't rate Corbyn much are annoyed by her hardline, pretty dishonest, stance, and it's the same on twitter. Not the real world I know but I don't think it's entirely meaningless either.That’s true - especially the part of the media.
They have to distance themselves from Labour in this instance also.
But yes, once the election is said and done, the tune will (very likely) change.
She does need to be careful with how she communicates this though - could easily backfire.