To indicate that people reject Zia Yusuf's claim that Ben Wallace is a "traitor", and that anybody with at least 2 brain cells can see through Reform's xenophobic tripe. It is by calling out the embedded nastiness in Farage's personality cult, tinged with typically British satirical humour, that they can be combatted and defeated.
Sitting back and letting things slide is the path to a British Nuremburg.