Oh, I think freedom of speech carries with it a responsibility to not be offensive when you are called out for being offensive to a minority or marginalized group in society, especially when caricatures perpetuate negative and derogatory stereotypes against people are least able to represent or defend themselves.While that might be nice (the same as if everyone were just polite, all the time) freedom of speech carries no such responsibility. It's for the law to say when speech goes too far, not finger waggers.
That something is not a legal responsibility doesn't mean it isn't a moral responsibility.
Freedom of speech extends to finger-waggers too.
In my personal view the powerful do have a moral responsibility to use that power judiciously not maliciously. That the cartoonists have a legal right to print the material does not abrogate my right to criticize it as in poor taste and a destructive force that contributes to hostility and misunderstanding. That's free speech too.