Chris Rock:
"Those crackers told me that my family should have all been strung up on trees."
Crowd:
"What fuckers said that?"
Rock:
"HAHAHA...I was only joking. I got you all!"
Nope...even coming from Rock, that's not funny.
Making fun of the idiosyncrasies of one's own race/religion/etc is one thing. Trying to make a joke out of violence toward that same thing...is quite another.
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"Nature has constituted utility to man the standard and test of virtue. Men living in different countries, under different circumstances, different habits and regimens, may have different utilities; the same act, therefore, may be useful and consequently virtuous in one country which is injurious and vicious in another differently circumstanced" - Thomas Jefferson, moral relativist