did you hear that scientists have finally discovered a cure for autism ? it 's called " cyanide " .
Are you saying that people people with mental illnesses shoud be killed?
People with mental autism should deserve a cure and, accordingly, they should be killed.
Even if this was meant as a joke, it is wrong to say that people with mental illness deserve to die, or even that they would be better off dead.  All humans are loved by their families, and you surely wouldn't want your friend to kill their child if it was born with a mental condition, so it's wrong to suggest that others should do the same.