This is all from the perspective of people who already oppose Farage, though. Supporters will zealously reframe everything as illegitimate attack. Soft skeptics will notice the establishment's overreach.

I agree this might be a normal political tactic on paper, but that's irrelevant when you're dealing with populism. The entire game is tribal framing. To anyone outside the anti-Farage coalition, this just looks like the establishment closing ranks, and that's more recruiting material for him.

What I can see happening here, at best, is maybe Farage stepping away if the pressure gets too much. But then you risk him getting replaced by a more angry figurehead who will use Farage's downfall as evidence of the "hatred and dirty politics" of the establishment.