[Kizzy]

I saw this as in it shines a light on marginalised groups, some it is still shall we say 'fashionable' to mock. The travelling community are being recognised as one of these groups, so to me Jimmy has just picked a scab as it were and it make's us uncomfortable to know many still find themselves dehumanising certain groups who we see as 'not like us'.
The audience were laughing, these are not all the alt right just regular people exposing a bias that like it or not we all possess due to years of social conditioning. So he held a mirror to that, it doesn't mean we all wish harm to travellers but it is an ugly truth that until we are confronted and deal with this like it was/is with other groups then attitudes won't change.

That's the crux of it, it still happens .. don't shoot the messenger.