Did not see the QT episode myself.
Engaging in personal insults within politics is probably not a good idea on the grounds of civility and also because the actual point can be lost in all the sound and fury surrounding the insult.
What is very clear though is that the UKip candidate, Diane James, had been assiduously promoting the idea that 4 million or more Bulgarians would be heading our way in 2014. And to offer up such figures without any thought is scare-mongering; That figure would represent over half of the Bulgarian population, and a moments thought will tell you that it is extremely unlikely that such numbers will be knocking on our door. The figures actually came from a poll carried out by Bulgarian TV, where they asked if anyone was thinking of emigrating to other countries within the EU in persuit of a better future; they had a total of 4,000 online respondents ( no guarantee that each response was bulgarian, or even unique), where 54% of the respondents said they might. To extrapolate from that, as UKip did, and suggest that therefore 54% of the Bulgarian population were all preparing to emigrate, and all would migrating to the UK is either stupid or scare-mongering.