I saw the interview, it wasn't that bad (pretty good question dodge, considering the stupidity of it all)...but surely they know the sooner they row back on this the better? Cast it off as a bad day at the office, and lick the wounds etc.
Otherwise they are in the 'deal with the devil' position of the Tories, when only the real intelligence/integrity vacuums achieve prominence as they are the only people that can front the indefensible crap that is handed to them.
I do have a smidgen of sympathy for the office that created it...They get hammered every day by downright false lies, delivered and framed as "Labour this" "Labour that" "Kier wants unlimited migration" etc, and they decide enough is enough, and fire one back (copying the style)...But as no-one (on the left, especially) really read or took much notice of the original Tory ones, that context is lost outside of the marketing office that spend their lives in this world, and it just comes across as a little unhinged, almost partridge-esque how it misses the mark.