The question is should we have to take a joke?
If you are the target of this 'humour', such jokes are not funny.
Trying to justify hate as some type of freedom of speech is a ridiculous justification.
Sure, it's easy to pick on the fat kid, or the effeminate one, or the ... well fill in the blank. But it is not humour, it's laziness.
What the people in this film seem to miss is that some of the greatest comedians never made a joke at someone's expense. They could/should take a lesson from them.