In what way it obvious? I've seen so many people make similar "jokes" just to spread their hateful rhetoric.

If you want to make a joke like this, you should really use a sarcasm tag or similar indicators that they're not your truly-held beliefs. Unfortunately modern conservatives have kicked Poe's Law into overdrive, and if one leaves a comment like this one wihout a clear indication of sarcasm, people really have no choice but to assume they're a bigot.