This is a whole other thread topic and not helping Paddy and his speech.You are focusing on one aspect of comedians routine/jokes, so should we abandon humour altogether then ?
Everyone has different opinions on this "humour". I find those Down Syndrome jokes in very poor taste and I have a brother with Downs so probably I am just sensitive / too close to the reality.
You can never get agreement on this issue IMHO, it's very decisive as to whether it is funny/acceptable or distasteful / unacceptable.