I get your point though. But where does the line between slightly dark comedy which makes a valid point, and this example drawn? At what point does it become 'actually fuck this, this isn't funny because actually this situation is getting worse and no one is listening'
I don't know that I do. But certainly not at this instance. Humour IMO can be very dark indeed provided it says something that is true and absurd, and this fits the bill pretty well.
Would it have been wrong for one of the guys to say "Gee, isn't it ironic that when we talk about controversial issues we get dropped from Youtube but PH with all it's terrible elements is one of the most popular websites in the whole world and liberals try and defend it as free speech?"
But the joke says the same thing in a way that makes the contrast more visceral - that's the function of social commentary humour. It doesn't explain the absurdity, it creates a situation where you see it, suddenly, for yourself.
That doesn't mean everyone has to find it funny. Some people just don't like dark humour and that's fine. I come from a medical family and my background is military, both groups which tend to have a very macabre approach to humour. I don't much like slapstick OTOH< it bores me to tears.
But there is a huge difference between not enjoying a certain type of humour and saying that it is offensive. I think that you are mistaking the discomfort implicit in the joke for minimising the seriousness of the content.