So, lesser of two evils is the game? If that's the game we're playing, than will you be voting for Reform or Conservative? Because we can't vote for third parties like Labour. That would be throwing your vote away. The two top parties in the UK right now are Reform and Conservative. If you believe that red lines don't matter, and that all that matters is choosing between one of the two parties that will win, then that means your choice currently is between Reform or Conservative. Labour is a third party. Labour is not a valid choice for anyone trying to be strategic and choose the lesser of two evils.
So, will you be voting Reform or Conservative next election? Or suddenly will the lesser evil no longer apply?
The only way anyone can support Labour right now is if they reject the lesser evil approach. Of course, if you do that, then you have no place whining about the red lines other voters have.